Last week, the site turned on three new features which Ismail hopes will allow him to create the ultimate “product graph” (this is like a social graph for products, showing how products are related or connected to one another). Reviewers can now identify competing or related products, and vote on which ones they like better in a head-to-head, A-B fashion. The third feature is a product rank derived from the first two features. For instance, based on 15 votes, the iRex iLiad beats out both the Kindle and the Sony Reader in the e-book category (so far):

I like the ideas of a product graph and product rank. A true product graph, however, would surface surprising connections. I know the iPod and the Zune are related products, but what about the more tangential connections, like the toaster oven with the iPodish design? That is what I’d like to see.

ProductWiki is another bootstrap startup with three employees (Omar, his sister Amanie, and her husband Erik). It was launched in November, 2005, and has about 15,000 product reviews.

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