We reached out to Scribd CEO Trip Adler, who says that the site is currently toning down its SEO efforts and further reducing pirated content. He also writes that there’s a dip associated with the summer season:

We made some changes that will have a short-term impact on traffic. Primarily: 1) improving our copyright filter, which keeps unauthorized content off the site and 2) reducing the aggressiveness of our SEO, which reduces total traffic in the near term but increases the relevancy of Scribd links in search engine results 3) trending down typical in the summer time — we experienced this last year at this time and other major sites (YouTube , Google Books ) are experiencing the same.

We’re not concerned about the dip – we expect traffic to go back up quickly. The metrics we care about at Scribd are active members of our community and uploads of unique, authorized works. As long as these numbers keep growing, we are positioned very well for long-term growth in unique visitors.

These product changes are part of a long-term strategy to focus on user experience and quality content. We call it a “controlled growth strategy”, similar to what Facebook did a few years ago. We have a lot product changes planned in the next few months that will increase quality / relevance / stickiness of the site.

It sounds like Scribd has some major changes coming, and it’s understandable that the site might want to prepare for those in advance. Still, it isn’t often that you hear about a site voluntarily killing nearly 50% of its traffic — perhaps Scribd didn’t expect its changes to have such a major effect (it’s sort of hard to believe that they aren’t concerned about the dip). That said, Scribd is still ranked as the 130th most visited site on the web by Quantcast, which is hardly anything to scoff at.

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That means developers and designers can henceforth tap into the Issuu platform and services to equip their own applications and websites with the oft-needed functionality of offering document consultation without the need for end users to download the docs or to visit the Issuu website. Issuu already offered two APIs: one for Search (which allows developers to sift through all Issuu publications, comments, and users) and one for its Viewer product. It is now adding a third one for the ‘Upload’ feature, obviously an essential one.

When Docstoc recently left the beta phase, it also launched with a number of open APIs. I’d check up on Scribd too, but their website is currently down.

Either way, we like Issuu here at TechCrunch. When the company first launched, it was one of the first services of its kind whose interface and functionality didn’t suck. The startup has been busy adding new features to its products and venture capital to its bank account – it raised a total of $6.25 million in funding to date – and is seeing decent traction as well.

According to co-founder Martin Ferro-Thomsen, Issuu currently services over 325 million monthly unique page views across its entire network of publishers (including embeds in articles etc.) and welcomes 4.4 million unique visitors to its main website Issuu.com every month.

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The old version was an improvement on Flash Paper, with a much smaller footprint and speedier browsing, but it still left quite a bit to be desired. For one, it was still clearly very Flash and not a native browser element. And the navigation bar at the top of the viewer was unnecessarily cluttered, making the widget seem bulky. Contrast that with Google’s document reader, which uses HTML and image files, and it just didn’t feel like a natural extension of the browser.

The new viewer (screenshot below) is a big improvement. It’s still in Flash, which may be enough to turn some people off, but it manages to look like it’s native. Scribd says that iPaper 2 does this by hooking into the browser’s native widgets (the company believes it’s among the first Flash apps to do so). It may sound like a small addition, but it definitely makes a difference. The new viewer also has improved searching functionality, adding the ability to see where a search result lies in context with the text around it.

Most of the other additions are more minor: the viewer simplifies the process to share a doc through Twitter or Facebook, and the view modes are a bit easier to use. But really, the big difference here is aesthetic, and it’s safe to say the streamlined design is a big improvement. iPaper 2 is currently live on Scribd’s main site, with plans to roll out support to embedded documents in about a month.

While Scribd is the leader in this space, it has plenty of competitors that offer their own document viewers, which include DocStoc, Issuu, and Edocr, not to mention Google’s own embeddable doc viewers.

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Sharing confidential documents within a business or between businesses can be risky—you never know who might leak a document or if your document is being shared with other employees. To solve this problem, startup Confidela has launched the beta of WatchDox, a SaaS product that allows a sender to control, restrict and track viewing, printing and forwarding of documents. We have 100 free beta invites here.

The service’s basic functionality is similar to document sharing services like Scribd and DocStoc but with ramped up privacy settings and tracking systems. DocStoc and Scribd also offer the ability to set documents as private, but WatchDox is giving users a few more tools that allow users to control and track documents.

Watchdox lets you upload any type of document, including PowerPoint presentations, PDFs, Excel files and Word documents. The service gives you a dashboard where you can control who the document is sent to, limit a recipient’s ability to view, forward or print the document and encrypt content of a document. Users can set expiration dates for each document and place watermarks on the document to show versions or the document’s recipient. Watchdox will also track recipient’s activities and location, including when a document is opened and the user’s geographic IP address. You can also send documents directly from Microsoft Outlook by via a WatchDox Outlook plug-in.

WatchDox, which is initially partnering with file collaboration and storage service Box.net to make the service available to all Box.net users, is currently in beta and adding features regularly. The startup will offer a free version of the service and will soon launch a premium version, which is $14.99 per month. Negonation also lets you upload and manage private contracts online, but is targeted towards the legal community. WatchDox seems like a useful service for documents that are confidential and private but you do lose the sharing and social elements of Scribd and DocStoc, which let users share documents with anyone and form groups around certain subjects.

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Popular document sharing service DocStoc just launched a collections feature, which lets users package documents around a particular topic. DocStoc has already created close to 50 collections, including “Starting a Small Business,” “Advertising Online,” and “Traveling on a Budget,” and is opening up the platform to users to add to existing collections and create their own.

The feature is just another way to organize your documents online and can be a pretty useful tool to manage large amounts of documents that relate to different topics. Competitors Issuu and Scribd both have similar offerings. Scribd’s “Group” feature allows users to organize documents around a theme and tries to connect users to other people who are interested in the same reading and topics. Issuu recently launched a collaborative Groups feature, where people can collect, organize and discuss publications related to any topic. DocStoc’s feature appears to focus more on the organization of documents around a particular theme than connecting users around that theme.

DocStoc is steadily growing, with 3 million documents uploaded and 1.6 million unique visitors a month in the U.S., according to comScore. (The company’s internal Google Analytics shows 4.8 million unique visitors worldwide). Docstoc recently took off its “beta” label with a homepage redesign, open APIs, and a new revenue-sharing model called DocCash.

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Issuu, a company that lets you upload a PDF or other document and then flip through it easily on a dedicated Webpage or in a small embedded widget, is adding features to its service and site with the aim of becoming a more engaging destination for users. We’re big fans of Issuu—when the company first launched, it was one of the first services of its kind whose interface and functionality didn’t suck. Other popular document sharing services include Docstoc and Scribd.

Issuu says that it’s focusing on adding features to make the the site more of a community for both its free users and enterprise customers. Last year, the startup launched the beta of Issuu Pro, a way for professional publishers to bring their magazines and newspapers to the internet and enhance them with a variety of digital features and the ability to customize the viewing experience. Publications are ad-free (meaning no ads in the viewer from Issuu—any ads in the magazines or documents themselves remain), and publishers were only charged when their content was viewed, with pricing ranging from $1.10 to $19 per 1,000 publication views.

Now, Issuu is taking its enterprise offering out of beta and changing its pricing model to a flat rate of $19 per month for any number of publications and any number of readers. Issuu has also redesigned its homepage for free and enterprise users so that the page gives you information about how your publications are performing including a newsfeed, statistics, and subscribers.

The site has also launched a collaborative Groups feature, where people can collect and discuss publications related to any topic. Anyone can quickly set up a group, style it and then invite friends. You can add publications and/or discussions directly, or by bookmarking a publication while reading it. Groups can be private or public, and about any topic you choose. For example, I found a group called “Travel the World,” which included travel guides.

Issue has enhanced embedding by adding customization and multiple view modes (magazine, presentation, text) and allows a full screen pop-up directly from the embed widget. Each widget now includes a Share menu (think YouTube), where users can share, embed, and explore without leaving the widget. And the site has added a Library feature, a user-friendly manager and publishing tool where you can edit, organize and publish/embed directly from the management platform.

Document sharing services are finding a strong user base and are growing rapidly. Scribd, which also has a community-focus to its user interface, offers the ability to create and join groups. Like Issuu, Scribd has a free service and a premium service for enterprises. According to ComScore’s March numbers, Scribd definitely has the edge over both Issuu and Docstoc, bringing in 12 million unique visitors worldwide in March. Docstoc came in second with 2.89 million unique visitors in March, with Issuu coming in third with 2.4 million unique visitors. On Quantcast, Scribd had 12 million unique visitors in the U.S. in March, Docstoc had 1.4 million visitors, and Issuu had close to 450,000 unique visitors in the U.S. However, Issuu’s new interface and features are really visually compelling and easy to use. Scribd is the frontrunner in the race to be the most popular document sharing service, but Issuu and Docstoc keep adding innovative new features. Competition breeds innovation.

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Famed Harry Potter author JK Rowling is taking on Scribd, the free document sharing service that has been likened to a “YouTube for documents”. Rowling and her publisher have discovered that a number of her books were being illegally shared on the site, after being pirated and uploaded by Scribd members. According to The Times, Rowling’s publishers (along with those representing author Ken Follett) were “battling last night to get free copies of their novels removed” from the site.

At this point it’s unclear just how much ‘battling’ is really going on – Rowling’s lawyer has said that Scribd is “quite helpful and they act immediately, but they won’t police it themselves.” Rowling and her representatives are concerned that Scribd is not proactively searching its database for pirated content, instead waiting for authors to submit complaints before pulling content down. Scribd says that it has an automated system that can prevent content that has previously been marked as pirated from being uploaded again, but given that it apparently isn’t even catching Harry Potter novels (which are likely among the most pirated books ever), I have a hard time believing the system is working very well.

Rowling isn’t the first author to attack Scribd for piracy issues, but her international acclaim makes her voice much louder than most. Her attack is a blemish on the site’s reputation, and perhaps even worse, it will likely have aftershocks – now that Scribd’s piracy issues are receiving widespread attention, more authors and publishers who weren’t even aware of the site may begin to discover that their content is being illegally hosted as well.

That said, not all authors and publishers are anti-Scribd. The site has recently been making headway with other authors and publishers who are legally hosting their content on the site as a means to increase exposure. And such piracy complaints are not unique to Scribd – other sites that host user-generated content (most notably YouTube) have had to deal with the same issues.

Update:
Scribd says that the is no battle going on between Rowling and the site, and that the Times piece is “inaccurate and misleading”, going on to say that Scribd is not being threatened with legal action. From the Scribd blog, which is entitled ‘What Ever Happened To Fact Checking?’

Yesterday, The Times of London published an article claiming that various authors, including J.K. Rowling, were “fighting” Scribd over copyrighted material on our site. Unfortunately, the Times’ article was misleading and included significant factual errors that must be corrected.
1. To make it absolutely clear, J.K. Rowling and the other authors mentioned are not suing Scribd and have never filed a lawsuit against us.
2. Scribd takes the concerns of copyright holders very seriously. It’s why we created our industry-leading copyright management system, which goes above and beyond requirements set forth in the Digital Millennium Copyright Act. Our system compares every work uploaded to Scribd against the tens of thousands of documents in our copyright reference database, and if someone tries to upload one of those copyrighted works, our technology prevents them from doing so. Every time a document is flagged for copyright, the file is entered into our system, and that work can’t be re-uploaded. As our reference database grows over time, our technology will become even smarter and faster.
3. Scribd is a document sharing site where people come to publish their grandmother’s 80-year-old pierogi recipe, to find Barack Obama’s latest economic plan, to read The New York Times’ official Madoff filing, to receive feedback on their new screenplay, and to reach a community of over 55 million readers. Books are a small reason readers visit Scribd but growing thanks to our recent partnerships with leading publishing houses, including Simon & Schuster and Random House. (See: Scribd Publisher press release.) These publishers and many authors are voluntarily giving us exclusive excerpts and full books because they see Scribd as a valuable way to get their works in front of tens of millions of readers. For a thoughtful and informed analysis of Scribd, here’s an Ars Technica post that presents a totally opposite take as The Times piece.
Also – our CEO is named Trip Adler, not Trip Adkins.

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Online document sharing site Scribd has announced that it has partnered with a number of major publishers, including Random House, Simon & Schuster, Workman Publishing Co., Berrett-Koehler, Thomas Nelson, and Manning Publications, to legally offer some of their content to Scribd’s community free of charge. Publishers have begun to add an array of content to Scribd’s library, including full-length novels as well as briefer teaser excerpts.

Offering book excerpts to entice readers is nothing new – Amazon and Google have been doing this for years, and Amazon’s Kindle allows readers to download book samples to their devices for free. But these options aren’t conducive to sharing content that you’ve discovered on the web, as they don’t allow your to embed them in your blogs and websites. Scribd’s iPaper Flash document viewer is built to do exactly this, so inserting a book excerpt into a blog or even an author’s site is easy.

Authors also benefit from increased exposure on Scribd itself, which sees a monthly readership totaling as high as 50 million. Authors can also expose their work to a much broader demographic – for example, author Tess Gerritsen, whose largest audience has historically been women in their 40s and 50s, was able to attract a younger readership when she temporarily posted her novel “The Surgeon”.

Scribd has actually been posting both full text and excerpts of books from some of these publishers for a few months now as they conducted trial tests. The fact that they’re now publicly endorsing the platform seems to indicate that they’re pleased with the results, and I won’t be surprised if we start seeing more publishers sign on. Also worth noting is that this announcement stands in stark contrast to the accusations of Scribd’s willingness to host pirated content – I doubt many publishers would be willing to partner with the site if they thought it was wrought with piracy.

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Canadian start-up Yourmagz.com launched the closed beta version of its SaaS content distribution platform today. You can sign up to view the site.

The platform – which can be described as a hybrid between social network platform Ning and web document sharing service Scribd – specializes in distributing publishers’ content across various websites, social networks, and mobile devices. So basically, a user creates a website (much like one can do on Ning), uploads print or video content and then can distribute a “virtual magazine” to Facebook and other social networks, mobile phones and websites with the click of a button. Each virtual magazine can have members who can comment and upload their own photos and videos.

Yourmagz will offer “freemium” based services, allowing anyone to use the technology’s core benefits for free. The founder says the premium service will be “low-cost” while declining to specify just how much he will charge for it. Yourmagz seems more likely to draw an independent, smaller publication. While it’s doubtful that a large magazine like Forbes would switch it’s content to Yourmagz, but it might be a useful side application.

Yourmagz.com is similar to an existing business. Scribd had a successful year in 2008, which could mean that there is a receptive audience for content sharing services like Yourmagz. You can also get a similar magazine-like experience for free with services such as Issuu.

But there are definite challenges in forming such a widespread and open platform like Yourmagz.com. Recently, Ning found itself in a sticky situation with the creation of adult sites. With Yourmagz’s tagline “Freedom to publish,” it doesn’t sound like the platform will be restrictive. Also, users may not want pay for access to the platform when they could use free services offered by Scribd, Issue, and Ning.

You can check out Yourmagz’s example of an embedded magazine or take a look at the screen shots below:

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This is a list of the products I tend to use daily. Some are for work (Wordpress, Delicious, Zoho, etc.), some are for fun (MySpace Music, Hulu, etc), and some are useful for both (Digg, Skype, YouTube, etc.). But I use most of them every day, or nearly every day, and I would not be as productive or happy without all of them.

The list changes a bit from year to year, and is also getting longer (see chart). Just three products have been favorites all four years: TechMeme, Skype, Wordpress. TechMeme continues to be the news aggregator I check multiple times per day to keep up on tech news. Skype is the instant messaging and VoIP platform that I use most often, and Wordpress software powers all of our blogs.

I’ve added nine new products, including one gadget (which I’ve left off in the past): Animoto, Friendfeed, Hulu, iPhone 3G, MySpace Music, Pandora (which was on in previous years) Docstoc/Scribd and Yammer.

I’ve removed six products from last year’s list: Amazon Music, Amie Street, Firefox, Flickr, Netvibes, Technorati.

I still use the products I’ve removed, just not as much as in previous years. I find I’m just using Netvibes and Technorati less this year (Netvibes because Google Reader is so excellent, Technorati has fallen in favor of Google Blog Search mostly because it’s too slow and has too many internal links). I tend to upload photos to Facebook now because of the people tagging feature and since it flows well with the rest of my news feed (I use Posterous for mobile uploads); Flickr is becoming less important for me. I have moved most of my music consumption to MySpace Music, and download DRM-free MP3s from iTunes when I want to buy. Amie Street is still a great place to discover new music though, and I think their business model, which is variable pricing for music based on its popularity, is sound. Firefox is off the list as I experiment with Chrome, but I haven’t made a decision one way or the other. When Chrome launches for the Mac, I’m likely to switch.

As in past years, there are a gaggle of other great products that I use regularly but didn’t add to the list in order to keep it manageable. I also haven’t added individual iPhone apps that I use daily, even though they are nearly as important to productivity and fun as the products that did make the list. Next year I expect more than a few will be added.

Here’s the current list, in alphabetical order, of products I use every day and couldn’t live without:

800-Free-411

800-Free-411 first made the list in 2007 and it isn’t leaving any time soon. Use it to make free directory assistance calls and avoid per call charges of up to $3.50 that cell phone carriers charge. The company has taken more than 6% of the market for directory service calls in the U.S. Google, Microsoft, AT&T and others have entered the market, but Jingle Networks, the company offering the product, has a patent on the idea of pairing advertising with free directory service. Here’s a tip: add “FREE411USA” as a Skype contact and do lookups that way, too.

Animoto

Animoto, which joins the list for the first time this year, does one thing, and well: it creates slide shows from photos. Unlike all the other services on the list, I don’t use it daily. But their new iPhone application put it over the edge this year. I really like this service.

Delicious

Social bookmarking site Delicious has been on the list for three of the four years (I took a brief detour in 2007 to a competing service called Blue Dot, then switched back). Delicious 2.0 is finally stable and the Firefox add-on is the reason I keep using it. Also, they long ago switched away from the annoying del.icio.us domain name, so I don’t have to look up where the dots go every time I visit the site.

Digg

Digg has been on the list the last three years. The site remains a fun place to hang out when I have some spare time to review the news, and Digg is one of our top ten sources of traffic. Hacker News is another Digg-like news site that focuses on tech that I visit daily as well.

Facebook

I visit Facebook daily to keep up with what my 5,000 closest friends are up to. I’m not a big fan of most of the applications that have launched on Facebook, but I do use it for photos and events. Unlike last year, though, I also now use MySpace as well regularly to reach people. These are the two social networks you have to be on to keep in touch with everyone.

Friendfeed

Friendfeed, a microblogging and activity aggregating service, only officially launched in February 2008. I use the service daily, although I’m not nearly as addicted as some bloggers are to the service. But like Twitter, Friendfeed is a good place to find breaking news on a variety of topics, and it’s become a must have service.

Gmail

I’ve never been a fan of the way Gmail groups message threads, and things like tagging of messages could be improved, but the service is far and away superior to any other web mail service in terms of features (Yahoo Mail has the best user interface in my opinion). I continue to rely on Gmail as my main personal email provider. Once Gears is integrated for offline use, I may stop accessing it via IMAP.

Google Reader

Three years ago I was using Bloglines to read feeds. Then I tried NetNewsWire for a while. But Google Reader, which first launched in October 2005 as a seriously flawed product, continues to evolve and is by far the best feed reader on the market today.

Hulu

Hulu isn’t about work, it’s about watching TV and films after the work is done. I openly mocked the service for nearly a year as they fumbled around, but now here it is, on a list of sites I visit constantly. I spend more time watching Hulu than I do normal cable television.

iPhone 3G

The first gadget I’ve included over the years – the iPhone 3G, which was announced on June 9, 2008, is simply the best device I’ve ever used. Sure, it doesn’t have a physical keyboard. But I can actually browse the web with this thing, and that more than makes up for a slower typing speed. This is a beautiful thing.

MySpace Music

MySpace Music is just a couple of months old and is still very buggy, but it changed the way users think about music on a big scale. MySpace combined its millions of band/artist pages with legal and free streaming music from the labels and creating a very compelling music product. Services like LaLa have a better user experience, but they still charge for streaming. Free is the future of music.

Pandora

Pandora, an Internet radio service that creates stations based on music you like, was on the list the first two years. I still listen to it all the time, and their new iPhone application put it over the top again to get on this year’s list. Pandora was one of the first startups we covered on TechCrunch, and they recently passed 20 million registered users.

Scribd & Docstoc

We use both Docstoc and Scribd here at TechCrunch regularly. Both services let you upload office type documents (PDFs, Word docs, Powerpoint presentations, etc.) and then embed them on other sites. When there’s a lawsuit complaint or interesting PDF, we add it to one of the services and embed it in our post.

Skype

Skype Skype has been on my list every year and I expect it will stay there. It’s the most important productivity tool that I have – I’d give up email before I gave up Skype.

TechMeme

TechMeme is another four-year favorite. It is the blogosphere’s daily newspaper, and one of the sites we use most often in seeing how stories develop. I’m amazed that founder Gabe Rivera hasn’t accepted any of the many buyout offers I’ve heard he’s been floated. In December 2008 TechMeme gave up on fully automated news, which I believe changes the site for the worse.

TripIt

If you travel a lot, you are going to love TripIt, which returns to the list this year. It keeps you organized, it’s incredibly easy to use and it’s just a perfect, simple service. Read our post on TripIt to get an idea for how it works. You forward confirmation emails from flights, hotels, etc. to the service and it creates an itinerary automatically. You can then access it via a mobile device.

Twitter

Last year a lot of people still hadn’t heard about microblogging service Twitter. Now, Britney is on it and the company is turning down half-billion dollar buyout offers. I mostly access Twitter through a desktop client called Twhirl, and I check it multiple times per day.

Wordpress

We continue to use Wordpress open source software to power all of our blogs, and it has been on the list all four years. Their Akismet spam comment blocking service is a godsend – without it we would quite simply be overrun with spam. It catches 15,000 or more spam comments per day and auto-deletes them.

Yammer

Yammer, a spin off of a startup called Geni, is a newcomer this year. They launched at TechCrunch50 in the Fall and took the top prize. The service acts as a Twitter for businesses, letting employees send messages back and forth to subscribers. It’s way more effective than email at group communications, and we absolutely rely on it here at TechCrunch.

YouTube

YouTube has been on the list the last three years. I continue to burn time watching random videos on the site, and we use it to upload our own videos as well. Sure they sent us a Cease & Desist letter a while back, but I still love em.

Zoho

Zoho, as well as its competitor Google Docs, continues to replace Microsoft Office for most of my word processing and spreadsheet needs. The feature list is still light compared to the heavy, expensive Microsoft version, but its free and I can collaborate with others on documents. This is the future of office productivity.

Update: I’m seeing other bloggers put together their own lists. Let me know in the comments if you do one and I’ll link to it. Here’s one by Tony Bain. More: Guilmain, NewsCred, Honkin (Chinese blogger), Ghost Hack Beauty, Mario Bruggemann

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The biggest surprise fro me in the social media rankings that I posted earlier today was the appearance of document sharing service Scribd in the top 20. According to the comScore numbers, it has more unique visitors worldwide than imeem and almost as many as Bebo, with 23.5 million visitors in November, 2008. (In the U.S., it had about 4 million visitors). This is a serious accomplishment for a startup that launched less than two years ago with $300,000 in seed capital.

Scribd, which raised a $9 million B round earlier this month, grew 218 percent from November, 2007. Scribd is heads and shoulders above other document-sharing services such as Docstoc (1.6 million uniques) and Issuu (1 million) in terms of attracting users. (All three are excellent services, by the way, and Docstoc is much closer to Scribd in the U.S.). Scribd users upload 50,000 documents every day.

What this tells me more than anything is that the concept of document sharing on the Web has legs and there is a real demand for it. (Unless Scribd’s numbers are artificially inflated—Quantcast shows an unusually steep drop-off in December, but that could just be a problem with Quantcasts’s data). Desktop-bound document formats like PDFs, Word docs, Powerpoint slides, and spreadsheets are increasingly irrelevant if they cannot be viewed and shared online directly in a browser. Scribd’s paper is an embeddable Flash viewer for nearly all document types. (I’ve embedded a document with sample job interview questions below).

It looks like we are not the only ones who like to embed documents on the Web.

Update: CEO Trip Adler explains the Quantcast discrepancy:

The drop-off on Quantcast was caused by the fact that we removed the Quantcast pixel from Scribd for a little while because it was slowing down page loads. However, I’m not sure why these numbers are still on the low side. According to our Google Analytics, we did 39.9 million unique in November, and if you include views of iPaper on other websites, it was way over 50 million uniques.

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What were the top social media sites of 2008? ComScore came out with its worldwide traffic stats for November a few days ago (so these don’t include December). They are a mix of social networks and blogging platforms. Blogger, the orange line in the chart above, still rules the roost with an estimated 222 million unique worldwide visitors in November (up 44 percent from November, 2007). Facebook, the blue line, is on pace to pass it soon with 200 million unique visitors (up 116 percent). (Note, though, that this is more than the 140 million active users Facebook itself reports—go figure). MySpace is pretty steady at 126 million uniques. Wordpress is a close fourth and gaining with 114 million (up 68 percent). And Windows Live Spaces is down 22 percent to 87 million uniques.

ComScore keeps a list of what it calls “social networking” sites, but these include blogging platforms and other social media sites as well. While the audience for blogs is still showing healthy growth overall, Facebook stands out as the social gorilla taking share from not only other social networks but blogs and other social media as well.

Below are the top 20 sites on comScore’s social networking list. It is really more of a social media site list, which is what I’m renaming it for this post. It is not definitive, but it gives a good lay of the land. (Here is a similar ranking from 2007). Note on this list the stubborn persistence of Yahoo’s Geocities at No. 6, the rise of Yahoo’s Flickr at No. 7, Six Apart at No. 10, and the presences of Chinese sites like Baidu Space and 56.com. The real surprise, though, is document-sharing site Scribd at No. 16, with nearly 24 million worldwide uniques.

Top Social Media Sites (ranked by unique worldwide visitors November, 2008; comScore)

1. Blogger (222 million)
2. Facebook (200 million)
3. MySpace (126 million)
4. Wordpress (114 million)
5. Windows Live Spaces (87 million)
6. Yahoo Geocities (69 million)
7. Flickr (64 million)
8. hi5 (58 million)
9. Orkut (46 million)
10. Six Apart (46 million)
11. Baidu Space (40 million)
12. Friendster (31 million)
13. 56.com (29 million)
14. Webs.com (24 million)
15. Bebo (24 million)
16. Scribd (23 million)
17. Lycos Tripod (23 million)
18. Tagged (22 million)
19. imeem (22 million)
20. Netlog (21 million)

Here’s a screenshot of the actual data (as you can see, I rounded above):

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Scribd, the popular document sharing hub, has finally rolled out a much-needed redesign. The site has long been hampered by a messy homepage that wasn’t attractive for first-time visitors, displaying a list of its top features in lieu of a YouTube-esque stream of featured documents. The old design made it clear that Scribd worked well as a utility, but didn’t make it attractive as a destination site. Now, the new site highlights a sampling of its top documents and includes a number of UX changes that Scribd hopes will remedy this issue.

One of the major changes in the design is a new emphasis on search. Scribd has seen impressive growth since its launch in Spring 2007, and now claims more than 20 million unique visitors monthly. But more than half of that traffic comes from search engines – something that the site would like to change. The new design is intended to make the search function more prominent, encouraging users to turn to Scribd instead of Google or Yahoo when they’d like to find a document. And CEO Trip Adler says that it’s working: while A/B bucket testing the new design, Scribd has seen the number of searches double (the number of uploads increased by 70% as well).

Finally, in conjunction with the redesign, Scribd has ditched its yellow generic “document” logo in favor of something that reminds me of colored pencils.

Scribd’s biggest competitor is DocStoc, a document sharing portal that offers a similar Flash-based viewer.

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Barack Obama’s campaign has posted a blog post announcing the launch of its official account on Scribd, the online document repository. The page, which can be accessed at http://scribd.com/barackobama, will serve as a resource for documents related to Obama’s policy, along with official statements.

Y Combinator-funded Scribd is a “YouTube for documents” that allows users to upload an array of filetypes that are converted to a Flash format viewable on most computers. The document viewer, called iPaper, can also be embedded in web pages. Since its launch in 2007, Scribd has seen explosive growth, and now claims to see nearly 20 million monthly unique visitors.

Scribd’s inclusion in the Obama campaign isn’t surprising given the candidate’s adoption of web-centric services like Twitter (his official account has over 52,000 followers). In contrast, opposing candidate John McCain has admitted to not being particularity tech savvy, though as we noted in our endorsements for the candidates, his policies will matter far more than what web 2.0 services he’s fond of.

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Mark Kaganovich figures that will get them online. After graduating from Harvard with undergraduate degrees in biochemistry and computer science two years ago, he set out to create Labmeeting. In May, 2008 he closed a $500,000 seed round from Peter Thiel, Kinsey Hills, and other angel investors. And since last week, Labmeeting has been open to anyone with a college e-mail account.

Typically, scientists have stacks of papers, protocols, and notes in their offices that they pass around as PDFs. Labmeeting is designed first and foremost as a document management site that allows scientists and students to easily upload all of those PDFs, organize them, search them, and share them. Scientsist can create groups, and invite other members of their labs to create a common repository of papers that can be accessed from anywhere. The PDFs appear inside an embedded Scribd window (Kinsey Hills is also an investor in Scribd).

Says Kaganovich:

What we are trying to do is change the way information in biomedical research and the medical community is distributed and retrieved.

Scientists can recommend papers to colleagues, mark them up, create collections, and follow what other scientists are collecting. Each scientist gets a profile page. By interacting through their research, they are more likely to interact with each other. Labmeeting could also form of basis a community ranking system for scientific papers, based on who is reading, writing, and sharing them.

Labmeeting is free for individual scientists and students. Eventually, Kaganovich plans to charge subscription fees to corporate users such as drug and biotech companies.

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Docstoc has taken a page out of YouSendIt’s book by releasing a desktop applet for sending documents to others via email without having to worry about size restrictions.

The Windows-only OneClick app enables users to right click on certain file types (Word, PDF, Excel, etc.) and choose to email them via Docstoc. The files will begin uploading to the startup’s servers in the background while an email composition window opens with pre-generated links to them. Recipients simply need to click these links to begin viewing or downloading the files, which can be up to 50mb in size and set as either public or private on Docstoc.

OneClick’s restrictions on file types and sizes mean that it will compete only minimally with more focused online file transfer services. But it does have the advantage of unlimited and indefinite storage, as well as background uploading (there’s no need to wait for uploads to finish before sending your email). At the very least, it’s a clever move to encourage more content contribution to Docstoc. As with Scribd and other UGC destinations, content is king – what else is Google going to index?

See a related announcement by Scribd from just last week that enables onsite previewing of email attachments.

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Drop.io, a file storage and sharing service, has partnered with Scribd to bring streamlined document viewing to the site. From now on all supported documents that have been uploaded to Drop.io will be viewable in Scribd’s Flash-based iPaper viewer.

Drop.io’s “drop box” storage isn’t exactly unique, but it has a nice interface and a few key features that help differentiate it from the pack. Earlier this year the site rolled out “Voice”, which allows users to call a number and record voice messages of any length, which can be used as personal notes or for podcasting. iPaper will allow users to view documents in a wide variety of formats (including most major office files) in any browser that supports Flash.

Adding Scribd’s iPaper will remove the hassle of opening attachments, but it seems like Drop.io is playing catchup – Box.net, a similar service, offers iPaper integration and lets users edit their files using Zoho. It’s possible that Drop.io is aiming for simplicity over a more complete feature set, but allowing for platform-agnostic file editing probably wouldn’t hurt. Other players in this space include Box.net and Dropbox.

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Scribd is launching iPaper@Scribd today, a new feature that lets users convert outgoing email attachments to the company’s iPaper format. Documents in iPaper can be viewed in any browser that supports Flash, which should mitigate the inevitable headaches associated with getting email attachments to work properly.

The system is remarkably simple: CC ipaper@scribd.com on your outgoing email message, and everyone else on the recipient list will receive links to Scribd-ified versions of the attachments. Scribd currently supports a wide range of document formats, including the dreaded Office 2007 format. Alternatively you can send the attachment to Scribd without CC’ing others – Scribd will send just you the link back and you can then forward it on.

In an exchange for convenience, users will have to deal with a few quirks. Every time you send an attachment using the service, your recipients will receive two messages: the original message with the attachment, and the one that Scribd sends containing a link to the iPaper version. Some people might like having an original copy of the document, but the prospect of getting even more email is a bit of a turn-off. Users can also simply choose to download the original document from Scribd as well.

The document is set to private at Scribd, which means it isn’t included in their directory or indexed by search engines. That still means this is a poor choice for sensitive documents since you are posting them on the Internet. But for less sensitive materials, this sure beats sending around huge attachments by email.

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Continuing its push to become a major provider of Webtop software, Adobe is releasing two new products on Monday: Acrobat.com and Acrobat 9. Adobe’s Webtop arsenal already includes the recently launched online version of PhotoShop and its online media player, Adobe TV. Acrobat.com is another big step towards bringing more desktop-like experiences to the Web. “It is our intent to blur a lot of the lines of the past,” says product manager Erik Larson.

Acrobat.com—Online Word Processing, Meetings, and File Sharing

Acrobat.com is a combination of three recently launched online services: Adobe Brio (online meetings), Adobe Buzzword (online word processor), and Adobe Share (online file sharing). Thus with the public beta launch of Acrobat.com, Adobe is taking on Google Docs, Microsoft Office Live Workspace, WebEx, and GoTo Meeting—all at the same time.

Buzzword is now integrated into Acrobat.com as the default word processor. (I reviewed Buzzword and Share when they first launched last March). Multiple people can edit a document and leave comments. Tabs along the bottom representing different people show you who has accessed the document most recently and their status (author, reviewer, etc.). It paginates documents, supports all kinds of fonts, and lets you create the closest equivalent to a PDF that is possible online.

All the documents on Acrobat.com are organized in what up until now has been Adobe Share. The document and file-sharing service now offers five gigabytes of free storage, and lets you embed documents in a widget on other sites across the Web. (I’ve put an Adobe PDF widget at the bottom of this post). This last feature should worry startups like Scribd and DocStoc, which are based entirely on the ability to upload and share documents in a similar fashion.

Finally, my favorite part, Acrobat.com includes Brio, which is a light version of Adobe Acrobat Connect. It lets up to three people have online meetings for free, with screen sharing, desktop video, voice conferencing, chat, white-boarding. You can add in a regular toll line for a fee. Anyone with a Mac is going to love this. Whenever I get a virtual demo, I prefer to do it through Adobe Connect because WebEx and GoTo Meeting sometimes don’t work with my Mac. And Adobe’s Flash viewer simply looks better.

Acrobat 9—Now With Flash

At the same time Adobe is launching Acrobat.com, it is releasing Acrobat 9—a major upgrade to one of its anchor desktop apps. The big news here is that for the first time, Adobe’s PDF-creating desktop software will support Flash. So people can now create documents with embedded Flash movies from YouTube, or developers can design entire new skins for electronic documents using Adobe’s Flex framework—the same programming tool they use to create Web applications.

PDF documents made with Acrobat 9 also support collaboration among multiple authors and reviewers over the Internet, making them connected documents. Best of all, they no longer take forever to load. The next step is for Adobe to make it easy to turn any PDF into a Web page, and vice versa.

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Scribd, the “YouTube for documents”, has announced that it will be removing all pornographic material from the site beginning May 21.

Here’s the announcement from the site’s blog:

Over the next month, we will be updating Scribd’s Terms of Service to prohibit pornographic documents and images. It’s become clear that adult content is limiting Scribd’s usefulness to educators, parents, students, and publishers – exactly the types of users that benefit the most from our site and services.

Starting today, there will be a one week grace period to allow users with adult content on Scribd to download it to their local computer before it is removed from the website.

So how will this affect the YCombinator startup? The site has seen impressive growth since its launch in March 2007, and now says that it has 17 million monthly visitors. It’s also recently been adding new features including an API and iPaper, a replacement for FlashPaper that allows authors to monetize their documents. But there have been claims (NSFW) that much of Scribd’s traffic is generated by pornographic and pirated material (the “Adult” group is one of the largest and most active on the site).

Should we expect Scribd’s traffic to take a nosedive? Unlikely. Porn may have helped Scribd gain momentum in its infancy, but the site has long since proven its use as a blogging tool and a document repository. If anything, it’s surprising that it took Scribd this long to make the switch.

Other players in this space include edocr and Docstoc (both of which are porn-free).

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Docstoc serves as a repository for professional documents, featuring forms, templates, and a variety of other material. Its flash-based viewer can be embedded into other pages, allowing documents to be viewed on external sites without needing an outside reader like Acrobat or Word.

The company is also introducing a Content Partnership Program (CPP) that will allow content providers to place their own ads around their documents, and to collect any revenue they accrue. The program is free of charge, but applicants will be screened for quality. Docstoc CEO Jason Nazar says that the program is designed to improve the amount of high-quality content on the site while establishing ties with valuable partners.

Docstoc raised $750k in Series A funding last November in a round led by Scott Walchek, Brett Brewer, Matt Coffin, Robin Richards, and Crosscut Ventures. Their primary competitor is Scribd, launched March 2007, which features a similar embeddable document viewer and a large collection of content. Scribd has raised over $4 Million to date.

Docstoc Series B Funding Press Release – Get more documents

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Pretty cool, but what’s the business? Scribd allows you to put contextual Google AdSense ads inside each document. Scribd will do a three-way rev share, giving most of its portion of the AdSense dollars to the document uploader. Now all those documents not already on the Web can generate some income.

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The service itself joins a growing list of document uploading sites that include Scribd and Docstoc, although the company claims that unlike these services Insightory is more targeted and heavily moderated. The content is aimed at management professionals, professors and graduate students and comes from a variety of sources including users from within the United States and elsewhere.

Insightory believes that companies need a constant supply of management knowledge and that their service can provide this; certainly it does help to get other opinions when in management so the service may find a willing audience.

The service is currently in alpha with a beta version to be launched this month and collaboration and networking tools coming in the first half of 2008. Insightory is holding a Contest for the best management-related documents uploaded to the site with prizes ranging from $100 to $3000, more details here.

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At the time of that post, where I suggested that they may be counting their chickens before they hatched, they said:

We are about to close another substantial round of financing from at least one, if not all, of the following investors 1) one of the co-founders of myspace 2) the angel investors in www.baidu.com and the head of mp3.com that lead the company to its 400M acquisition – at least one of these players will lead our next round, and all three parties may participate. Financing is expected to close by the end of the month.

Well, their gamble paid off. They raised a first round of financing from Scott Walchek (investor in Baidu), Brett Brewer (co-founder of MySpace parent Intermix Media) and Robin Richards, the former president of MP3.com. They won’t disclose the size of the financing to me, but they certainly closed on the investors they said they would.

The startup itself remains unlaunched for now, but I’ve seen a demo and its got potential. Like Scribd, Docstoc is a sort of YouTube for documents – users can upload just about any document type (MS Word, Excel, PowerPoint, Adobe Illustrator, and PDF) and display via a Flash interface on any website. But there are key differences, too. Our first post on the company is here.

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Today Scribd has released some numbers talking about just how big they’ve gotten as well. Since launching 6 months ago, the site has collected over 178,798 documents. That may not seem like much compared to Wikipedia’s over 5.3 million articles (source) across all languages (as of last September), but Scribd users seem more verbose. Scribd users have uploaded over 1.9 billion words, which would take up over 2,287 of Smolenski’s volumes (13.4 GB). No word on how many of those words are copyrighted.

However, Wikipedia is still obviously the pageview king, drawing over 7 billion pageviews (June) and 42.9 million (Feb) visitors per month, to Scribd’s 3.8 million uniques. Google was responsible for 24% of the traffic, and I imagine the same is true for Scribd. Wikipedia also features highly targeted and edited content to Scribd’s library of reports and rants. Although, unlike Wikipedia, Scribd is helping a lot of people catch up on Harry Potter.

Scribd has had quite a ride since launching over 6 months ago. They sustained a considerable amount of traffic after launch, and eventually went on to raise $3.5 million from Redpoint Ventures. Apparently, easily publishing documents online was not a solved problem.

Here’s a chart of the word growth of both Wikipedia and Scribd:

Note: According to statistics listed on Wikipedia, the site (all languages) has grown from 49,000 words in January 2001 to 1.7 billion words last September (the last reported point). Since the data only goes to September 2006, I extrapolated the growth (yellow) assuming the previous year’s monthly growth rate of 7.7%.

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