List of Web 2.0 sites

It's 2007, and if you're any respectable sort of geek, you'll know what Web 2.0 is. But if you still do not know what Web 2.0 is, well, the best way is to try out the various Web 2.0 sites yourself and experience what this thing is all about. The Web 2.0 Magazine site has a list of Web 2.0 sites that you can check out. For the rest of us, this is a great list as reference to see what other Web 2.0 sites are out there to try out.