The Complete Web 2.0 Directory
Wow. Learned about Go2Web20.net, which touts itself to be the complete web 2.0 directory, via this article (found via Digg.com).
Web 2.0, by the way, is defined by Wikipedia.org as (italics mine)
a phrase coined by O'Reilly Media in 2004, refers to a perceived or proposed second generation of Web-based services—such as social networking sites, wikis, communication tools, and folksonomies—that emphasize online collaboration and sharing among users.
Just press the Select Tag button at the top and choose what kind of web 2.0 sites you are interested in and voila, the relevant web 2.0 sites appear.
And indeed, just like the article title asserts, "Web 2.0 is really here!" Happy exploring! (And please share with us your favorite Web 2.0 site.) 
