Xing has acquired leading Turkish business networking site Cember.net.

Cember.net is said to be the biggest business networking site in Turkey with over 280,000 members. The site is ranked at 117 in Turkey according to Alexa.

Xing said it would use the acquisition to strength its penetration into Turkey, “one of Europe’s fastest growing economies.” Çağlar Erol and Nihan Colak Erol, the founders of Cember.net, will stay on with Xing to support the Turkish-speaking Xing community with a small team based in Istanbul.

The price of the acquisition was not disclosed.

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Plaxo, the Sequoia-backed start that transformed itself from a hated spam monster into a mild mannered and interesting business social network, has started a sale process according to a source. They’ve hired an investment bank, Revolution Partners, who are spearheading the sale effort.

We do not know what price Plaxo is looking for. The company has raised $28.3 million to date over four rounds, including $9 million last February. The company had over 15 million users as of September 2006, and their recent integration into Google Open Social has led to a further growth spike.

There were rumors in mid 2007 that Plaxo was being acquired by European competitor Xing. Those rumors were either inaccurate or the deal was never completed.

I have an email in to Plaxo CEO Ben Golub for comment. If I were him, I wouldn’t respond.

Update: User data from John McCrea, VP Marketing at Plaxo:

For our networked address book service, we’re right around 20 million users, plus another 15 million address book accounts hosted through partnerships.

Increasingly, though, we are focused on Pulse as the key driver of active users (and pageviews), and although we are still in beta (and haven’t yet broadly promoted to the address book user base), we’re seeing good month-over-month growth in all the key indicators. With Pulse, we’re at 1 million unique monthly users, up from 250K at the beginning of November. In terms of page views and time spent on the
site, our per-visit numbers appear to be comparable to Facebook (based on data from Compete.com), even though our demographic is much more like LinkedIn’s (professional, 25-50 y/o).

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Corporate social networking application Visible Path is set for an acquisition soon. The term sheet has been signed and the acquirer, says the company, is a “multi-billion dollar international company with established sales and technology operations.” No word on the terms of the deal, but a worthwhile exit price would be high considering the $22.7 million already invested in the firm.

Visible Path differs from other business social networks like LinkedIn or Xing, by creating your social network out of your email inbox. The service is based on an Outlook plug-in that impressed us earlier because your connections are based on the frequency of your real interactions and not random friending or pokes. These relationships are mapped online and make up a directory of people you can search through by skill or relationship. It’s a useful feature that I imagine a service like the “email utility” Xobni implementing.

Visible Path never saw as great a level of adoption as LinkedIn, which launched around the same time and has effectively cinched the U.S. corporate social networking scene. Maybe their new partner will give them some much needed exposure.

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Update: I spoke with Plaxo CEO Ben Golub and a spokesperson from Xing this weekend. Both deny the deal, although Xing has other news later this week, they say.

We are hearing a LOT of chatter about a possible Xing-Plaxo merger in the $250 million range. The deal makes some sense - newly public Xing is headquartered in Germany and hasn’t gotten much traction in the U.S. where it competes directly with LinkedIn. Plaxo, with a very strong U.S. presence, could give them the opportunity they need to attack this market.

But people who would be very likely to have knowledge of the deal are saying they’ve heard absolutely nothing. One thing we are hearing from everyone, though: Plaxo is definitely in play. The company’s fair valuation is another matter. Last year they crossed 10 million members, claimed they were getting 50,000 new members per day, and had just become profitable. But it has been more than a year since Plaxo released those stats.

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Last week we reported on Frazr, one of Germany’s many Twitter clones (if you’re eager for more side-by-side comparisons, see Sloggen, Wamadu, Faybl or 1you, which all launched in March or April). Frazr is symptomatic for the state of Web 2.0 in Germany and to get a better understanding for the many international developments, this post starts a series of regional profiles on Web 2.0 around the world. I’ll start the tour with a closer look at Germany, home to Europe’s largest population of internet broadband users.

Hype vs. Hesitate
Just as this week’s Pew Internet Study stirred a debate on the view of Web 2.0 in the US, Germany has seen similar arguments on the size of the phenomenon locally. For a long time, several indicators had hinted that Germany was falling behind in broadband penetration compared to other European countries like Sweden or Norway. But a recent OECD study painted a very different picture: looking at the total number of households (as opposed to per-capita penetration), Germany comes out on top in Europe with 14.1 million subscribers in December 2006 (followed by the UK at 12.9 and France at 12.7 million). So the crowds are here, but where can they go?

“Web 2.0” is a term that brilliantly translates around the world, but many of the sites that are commonly associated with it have a language barrier for international audiences (take MySpace for example: it officially launched its German version only in March of this year).

While English certainly isn’t foreign to Germans, it has still slowed their adoption – and network effects, which have been a driving force, are often tied to language and reach as well. What’s been the consequence in Deutschland? A mushrooming of German copycats that have localized and copied their US role models, sometimes down to the last pixel.

Copy/Paste Innovation
Whether you’re looking for social bookmarking, photo sharing, video posting or a college social network, Germany’s clever entrepreneurs have done the translation for you and some even fared quite well.

The best example by far is StudiVZ, whose name stands for “student directory.” Launched in October 2005, it now claims to house 2.1 million users. Despite a myriad of security problems and controversies, new users kept coming in, which only speaks to the universally strong demand for such networks among students. In January of this year, Germany had its mini-YouTube moment when StudiVZ sold for €85M ($100M) to the German media conglomerate Holtzbrinck Group.

If the screenshots look familiar, you won’t be surprised to hear that StudiVZ’s early versions of the site were using filenames like fbook.css or poke.php. (Facebook was in talks with StudiVZ but it walked away because of scalability and security concerns about the platform. Instead, Facebook is now working on its own strategy – let the battle begin).

Another success story is Xing (formerly OpenBC), a professional network like LinkedIn. In December 2006, it became the first Web 2.0 company to go public and is now traded at the Frankfurt stock exchange. Xing’s rapid growth among the German business community came rather unexpected after it launched in November 2003, especially in a country that isn’t typically known for its culture of business networking. The site now boasts 2 million members and about 13% of its users pay for a monthly premium subscription of €5.95. With revenues of €10 million in 2006, Xing’s performance at the stock market has been somewhat lackluster and the real test for the company will come as both Xing and LinkedIn expand beyond their original markets (LinkedIn now has 9 million registered users and $10 million in 2006 revenues; it recently raised $13 million more).

The Brighter Side: What’s next
Of course there are creative and innovative startups to be found (and growing any multi-million user base is a feat in itself regardless). For some inspiration, take a look at our previous coverage of Plazes (currently a sponsor) and SellABand; last week also saw the launch of MindMeister, a promising online mind mapping collaboration tool. Other notable services include blauarbeit.de, a growing reverse-auction site for jobs and services, and we have yet to wait for a successful US counterpart.

In short: Germany is buzzed right now and the biggest question for the startup scene is how the many look-alikes will develop over the next year. You’ll often hear that investors are hesitant to invest in ideas that “haven’t been proven in the US yet” but there are several other factors at work here: Germany is generally more risk-averse, the bureaucracy is more cumbersome, and entrepreneurial networks like Silicon Valley aren’t as strongly developed.

Nonetheless, the country’s business angels and media conglomerates (Holtzbrinck Group, Burda, Axel Springer) are eager to invest with rapid-fire pace at the moment but the majority of German internet users have yet to be convinced that there is a land beyond eBay, Google, Wikipedia and some online news sites.

Meanwhile, German and other European startups are in a prime position to tinker with mobile applications and I wouldn’t be surprised to see more innovation in this space soon. The continent is covered with advanced data networks and the UK has already seen the introduction of flat-rate data plans at reasonable prices. Germany’s market is sure to follow and the boon of the mobile web will start in Asia and Europe sooner than in the US. You also want to watch out for innovations around IPTV as subscriptions are expected to reach 2.6 million in Germany alone by 2010.

Until then, let’s see how Facebook and StudiVZ duke it out

Curious fact: Google’s market share for search is near 92% in Germany. And yes, it’s a verb here, too.

Gregor Hochmuth is an analyst and entrepreneur in residence at Hasso Plattner Ventures. He runs zoo-m.com and his own homepage at dotgrex.com.

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