Have you seen this website yet?
It lets you have a virtual bookshelf with all the books you have read, want to read or just plain own. You can rate your books and give reviews. It even lets you have your friends join and then you can see their books. It's a neat site for people who love books.
I just started Friday and am having a blast filling up my shelf. It's a way to pass the time on the computer if you have nothing else to do or just want to read about books. Check it out!