I caved in and got a Facebook just a few weeks ago, just to see what the hype was all about. It seems like a neat enough place. I have an LJ, mostly just to be able to read friends-only journals. A last.fm, periodically I converse via shoutbox there, but not so often these days. I have a virtually unused Twitter. What more... I guess you could call DeviantArt a social network of sorts, I have an account there although I haven't uploaded anything in a long time.