Thanks to Om for pointing me to Mobster. I’m always interested in programs that take pay attention to music I am listening to, and based on data it collects from other sources (be they people or collaborative filtering engines), tells me what else I should check out. I don’t know why there aren’t better recommendation engines for web sites to use. I’m talking about the music variety here, but it could extend out as more people listen to or watch streaming media. At this point there are quite a few more people listening to music on their computer than there are people watching TV shows or movies on their computers.