At the eve of the Web 2.0 Summit, we thought we'd share this short video taken during a press conference at the Web 2.0 Conference & Expo, held earlier this year. There, Tim O'Reilly and John Battelle were answering questions from reporters about... guess what?... Web 2.0: before and after :-)
For those who don't know and still want to know (!), here's how it all started according to Tim O'Reilly:

"The concept of "Web 2.0" began with a conference brainstorming session between O'Reilly and MediaLive International (acquired later by CMP). Dale Dougherty, web pioneer and O'Reilly VP, noted that far from having "crashed", 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? We agreed that it did, and so the Web 2.0 Conference was born".