Library Thing

http://www.librarything.com/home/jamilibrarian

Library thing is pretty cool--but I have a lot more than 200 books! And I'm too cheap to pay for a subscription. Still, it was neat to see what other people who listed the same books as me also had in their library.

This could be a good thing to show customers, though--until we get a feature on our catalog or website that tracks what people have checked out in the past, this could be a substitute. Instead of entering what people have in their personal library, they could enter what they've read from the public library.