I’ve found a very cool interactive listening service at pandora.com, where you can build your own radio stations simply by suggesting an artist. I suggested BT, and they began playing similar music. As you listen, you guide them by indicating whether you like what you hear or not. And they don’t just suggest music by genre; for any song, you can click “why did you play this song?”, and it’ll tell you why. Here’s an example of why they played “Greece 2000″ for me recently:

Based on what you’ve told us so far, we’re playing this track because it features trippy soundscapes, prevalent use of groove and many other similarities identified in the music genome project.

Very cool, very cool indeed…