Here are some of the sites that I go to to get my fill of web 2.0 info. Plus a quick note on each re: my thoughts.  

www.techcrunch.com -

 

web 2.0 pop music. These guys a very broad force now. I'm not even sure it is clear what they mean apart from being the ones that everyone wants to be covered by. They have some depth with crunchnotes and pod casting areas. 

 

www.readwriteweb.com 

Read Write Web is by Richard McManus. It covers in a little bit more depth than tech crunch, but perhaps not as wide.