Wikizon

Rob Hof

Amazon.com doesn't blab about it much, but it clearly gets the Web 2.0 participatory thing. For years, it has had customer book reviews, customer-produced product lists called Listmania, product photo uploads, and something called Purchase Circles, which indicate what products are popular in various locations and companies. (UPDATE: Oops, forgot two other new participatory activities still in beta: customer discussions and tagging.)

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