Bookbump

If you are an avid reader like myself, but also a poor organizer (like myself), then head over to Bookbump and try out their webapp for cataloging your book collection. It's fairly simplistic and lets you add currently owned books with the ability to track them by pages read, start/completion dates, condition and even who you loaned it out to. It also lets you create custom lists which is a nice feature for me, I have a written want-list that I lose every month and can now keep track of it online. Very handy if you are a non-programmer type and can't create this kind of database on your own.