Here's a Web 2.0 List, which is a big huge tagged list (634 items at present) of Web 2.0 sites and services and apps that you can rank, bookmark, or digg. It's pretty Web 2.0 itself, actually. Then there's Rich Ziade's essay Reality Check 2.0 at Basement.org, which begins, "I think it's really important to occasionally step out of our own bubble and assess whether or not all this 'stuff' is really breaking out of our world and into the rest of the world. Ironically, the most un-Web 2.0 platform of all, Myspace, defies all logic." And then there's Paul Boutin's Web 2.0 article in Slate, subtitled "The new Internet 'boom' doesn't live up to its name." Both Ziade and Boutin make good points and aren't too long, so have a read.