O'Reilly: What Is Web 2.0
a good intro to what is web 2.0
Top Five Web 2.0 Venture Capitalists
AMASS - ajax mass storage
Micro Persuasion: Ten RSS Hacks
5 Earth-Shattering Things You Should Know About Ajax And Probably Don't (web2.wsj2.com)
good note on ajax
AJAX: Dawn of a new developer
XML.com: Introducing del.icio.us
a technical introduction to del.icio.us with code examples in python
Best Free Web Applications
Web 2.0: Conversation with Five Teenagers
Particletree
The best thing about Web 2.0