A friend of mine pointed me at this site a while back, and then again recently when I was looking for music to listen to. They appear to get most of their data from amazon, but I’m not sure. Basically, you can pop in a band of your choice, and it will provide a flowchart deal to other groups that match that genre. Its a pretty cool way of finding new music to listen, especially when your local radio station will almost certainly fail to entertain you from one hour to the next.