Oh, beware of Shelfari's offer to use your address book to send out the invites. While it appears that you have the option of selecting who you want to send the invite to, it will send the invite to EVERYONE in your address book. Other than that, it's still pretty fun if you're into books.
"It truly is the one commonality that every designation of humans you can think of has, there's at least one asshole."
--Me