This could have passed unnoticed. In a post about Dell an the fact their online shop was more 2.0 than their ideagora Ideastorm, Tim O’Reilly made his definition of web 2.0 seriously evolve from the original one.
For your information, here his the "original" defintion as it can be found on wikipedia today.
Web 2.0 is the business revolution in the computer industry caused by the move to the Internet as platform, and an attempt to understand the rules for success on that new platform.
A visionnary definition that was victim of...