I stumbled across an open source book cataloging application for MacOS X called Books and it seems really cool for being in beta stage. Lots of built in importing and exporting options, data gathering using Amazon and and ISBN and a nice clean interface. My only real complaint is that it let me quit the application without saving my database first. Luckily I had only entered two books so it wasn’t a big deal.
I definitely want to go through my book library when I get home and start entering some more titles.