Okay, I looked at Library Thing. I joined, added some books and looked around. I don't like it as much as GoodReads, which I have been a member of for over a year now. All of my book lists are on GoodReads. I have friends on GoodReads. Sorry Library Thing, I won't be coming back.
I joined Twitter and look at it occasionally. It seems usless to me. What are you doing now? who really cares. If I want to know what someone is doing I will call them or send an email. Maybe I'm just old. Maybe kids really like this site.