Library Elf

Library elf is a good webpage that allows you to get email notifications and rss feeds of your books that you have borrowed/waiting to borrow from the library. Although the Columbus Metropolitan Library already has email notification, the good thing about this is that you can list all the items from all your family members in one place. That way you know who has what out (or if your wife has reserved something under your library card!)
I'm still looking for a book reading tracker app and haven't found one yet. However, this might be a good application to get started with .net