Discover Music through The Music Genome Project by Pandora
They have a great interactive player that allows you to search for music that you like and it plays music that you would probably like. You can give thumbs up and thumbs down as well as add more artists to the mix. Too bad that it has to be slightly crippled due to the DMCA.
From the site:
Together we set out to capture the essence of music at the most fundamental level. We ended up assembling literally hundreds of musical attributes or “genes” into a very large Music Genome. Taken together these genes capture the unique and magical musical identity of a song – everything from melody, harmony and rhythm, to instrumentation, orchestration, arrangement, lyrics, and of course the rich world of singing and vocal harmony. It’s not about what a band looks like, or what genre they supposedly belong to, or about who buys their records – it’s about what each individual song sounds like.