Writers & Readers Websites Wednesday - Library Thing

For Readers and Writers Websites Wednesday I ran across Library Thing. 
Somewhat like Goodreads it's like a great big book club. Once you join you can get customized book recommendations and you can join the Early Reviewers program in which you can register to receive advance copies of forthcoming books in exchange fore writing a review along with the chance to take a peek at the bookshelves of famous authors.
Check it out. Let me know which one is your favorite.