I've been avoiding Facebook and all "social networking" websites. If there were an antisocial networking site, I might join, but what would be the point. I have that already right here on the AL.
Still, many academic librarians want to get on Facebook as a way to expose themselves to students. Here's one inspiring story for the Frustys, about a librarian who had an entire Facebook group dedicated just to him, with about 350 members! Now that's the sort of popularity most librarians can only dream of!