Thanks Michael for asking about Web 2.0
To me - its starting of a new era.
Online journals were written by people in 1997 too. But today, they are called blogs. Its the same thing. But coin a new name and the idea catches fire.
To me, web 2.0 means
user generated content and
easy collaboration.
This link is a worthy read:
http://www.oreillynet.com/pub/a/orei...is-web-20.html
MP3.com = web 1.0
Napster = web 2.0