Delicious Library has a lot of neat features that I simply don’t use, but the best use I’ve found for it so far is cataloging your vinyl collection. Unfortunately you have to manually enter everything, as well as find the album art yourself… but it’s really handy to have your collection in a lusciously designed searchable beast in your pocket.
It’s $40, but the demo let’s you add 25 items so you can play. The iPhone app is free.
Also, be sure to check out this fun stop-motion video introducing the iPhone app.