Via Wired's article on Web 2.0 in libraries, I found the fabulous resources 'Web 2.0 and Libraries: Best Practices for Social Software' and 23 Learning 2.0 things: "23 Things (or small exercises) that you can do on the web to explore and expand your knowledge of the Internet and Web 2.0" at Learning 2.0, an "online self-discovery program that encourages the exploration of web 2.0 tools and new technologies".