Musotik

Musotik is a search engine with a simple premise: give it the name of a musician you like, and it will scour the Net for music, video, and information related to the artist.

In five minutes of random and completely unscientific testing, it looks promising. It pulled up a ton of information on country singer-songwriter Guy Clark, and even managed to locate some album covers for jazz drummer/bandleader Paul Motian.