Want to keep track of what everybody is up to on ALL of their Web 2.0 sites, from FaceBook, to MySpace, to Twitter, to LinkedIn? Try Spokeo! It’s free, and signup is easy (you’ll need a webmail account with Yahoo, AOL, or Gmail). Once you join, it imports your contacts from your online address book, and then goes out and checks on their social networking activity. Potential library uses? I’m not sure, what do you think?