I joined the Library 2.0 ning this year, but have not yet gone to Facebook. Technology overload. That you can use video and other apps on Facebook, nings, etc, is useful as a community resource. In the past week I've seen three references to Facebook in the local newspaper. People have died and the paper reports that readers can leave messages on their Facebook sites. Virtual mourning? I explored Facebook v Myspace earlier here: some professional library usage.
Here's the Library 2.0 badge - go there. Actually, if someone can tell me how to make a badge I'd be happy. One for the new wordbox.
Visit Library 2.0