If you are a bookworm, then Shelfari is the site for you. An online networking site for readers, writers, and publishers, you can find out about other books you might choose to read with others that are into the same topics. A virtual bookshelf, the site allows you to join a group with a preferred author, post your faves, or start your own book club. You can then add to your list and embed it in your blog, website, or social networking site, and send out invitations to others. The service is now in beta and is free to join.

(Thanks, Stace)