What is Web 2.0

Tim O'Reilly writes that concept of "Web 2.0" began with a conference brainstorming session between O'Reilly and MediaLive International. Dale Dougherty, web pioneer and O'Reilly VP, noted that far from having "crashed" with the dot-com bubble in 2001, the web was more important than ever, with exciting new applications and sites popping up with surprising regularity. What's more, the companies that had survived the collapse seemed to have some things in common. Could it be that the dot-com collapse marked some kind of turning point for the web, such that a call to action such as "Web 2.0" might make sense? This article is an attempt to clarify just what they mean by Web 2.0. Syndicated data services? Collective intelligence? Who owns the data? Users add value? Nothing new to librarians, but read more about PC-free services and the rest.