I just used Delicious Library to publish my book library online. It will be updated periodically to include the actual books I own which is a good bit more than just the ones I own. I use delicious library to help me track the books I loan out. The best part is the barcode scanner. Woo hoo!

You can find my library at: http://jritchie.com/deliciouslibrary/index.html

And a permanent link has been placed in the description area of my main page.