multiple people seem to have caught on to this simultaneously... so good. pandora.com allows you to type in a song or an artist and get a sweet playlist of similar tracks streamed to your 'puter... ANY MUSIC OF ANY KIND. genius. refine the list and add other artists or start a new playlist - register to have and save multiple stations. sweet.
I have a sweet little F.S. Blumm/Tin Hat Trio/Christian Wallumrod Ensemble list going on right now... try it and see beautiful musics!