I created a group for us at GoodReads.
http://www.goodreads.com/This sites lets you share what books you are reading with your friends, rate all the books you read and give you suggestion on what to read next based on your ratings.
If you want to join the group, go create an account there and PM me the e-mail address you used so that I can add you (I set the group privacy level to secret so that's the only way you can join).
I hope to see you there.
P.S.: If Pitti wants to moderate the group, I'll cede moderatorship to him as soon as he join the group.