I'm in the mixed feelings camp as far as facebook goes. I am fond of wasting time online, and I got a facebook account in November, but within a month or so I started getting sick of it. I haven't pulled the plug, but I have been tempted.
Is there a forum thread yet for FOTs on twitter? I've found and am now following a handful that I've gleaned from Tom's list of followers, but a one-stop listing here (again, let me know if it already exists) might be helpful.