I've just discovered that my friend Michael Dirda, Pulitzer-prize winning book critic for The Washington Post, has a relatively new discussion group going on over there called Dirda's Reading Room. It's a really neat forum where group members can post in all kinds of different threads discussing books. Michael is the moderator and joins in often. He's one of the most well-read and literature-savvy people I know, so discussions are sure to be insightful and interesting.
If you are a lover of books and literary discussion, I suggest you head on over and give it a try. Joining is free (just register with the Post), and then you can start right in geeking out about books. I've already found several threads to contribute to.