Nerdery.

I recommend Imeem to find new music.
This website will allow you to look up and stream just about any song through their online database. It can automatically set up a play list for you, or, you can make your own. enjoy!


And, the next version, coming to the US soon (allegedly the holidays)
for the people who likes to stay ahead of the curve, look into Spotify. It's just about to launch in the US, and Spotify will make it easy to listen to the play lists you make online anywhere.
(If you subscribe)