I have heard about this from multiple sources but finally got a chance to check it out for myself. What I am referring to the music genome project over at PANDORA. It is an amazing music experience that I highly recommend.
Here is how it works. Simply type in the name of a musical artist or song that you simply love. Pandora will then build a radio station filled only with music from similar sounding artists and songs. I made 11 stations last night and was very impressed with the accuracy of the project.
What I really love about this is not that I get to listen to the bands that I like but that it exposes me to many bands that I love but would never have been exposed to otherwise. Pretty cool stuff. You should check it out.