Have you heard about this website: www.shelfari.com
I recently created a page over there, which you can find here: www.shelfari.com/pamelatyner
This is a really cool website. You can create a bookshelf and add books to it that you’ve read or that you want to read. If you wish, you can write comments/reviews for the books. You can also find other members with the same book(s) on their shelf, so you can talk to them about the book(s) and/or browse their shelf to see other books they liked (similar reading taste and all that).
My only complaint about it is that you can’t add ebooks to your bookshelf, but I’m hoping they will add that capability soon.
If you’re a reader and you haven’t checked this site out yet, then you really should :) And if you join, please feel free to add me as a friend!