this is kinda cool. Pandora is created by the folks who did the Music Genome Project. you type in the name of an artist you like, and then they create a streaming radio station with artists who have musical qualities similar to the artist you typed in. if there's a new artist you like you click the link to the iTunes store or Amazon. it may have a few kinks. for example i typed in "blackalicious" two different times and it gave me two different descriptions of their musical qualities. it's still neat though. it's descriptions of goapele included mild rythmic snycopation,, minor key tonality, and vocal-centric aesthetic. other descriptives are like clean lyrics, party style, laid back lyrics, clean lyrics, thin orchestration, acoustic drum samples, dry sound... endless!