I've just discovered the coolest thing in the universe.

http://www.musicovery.com/

"Discover your musical universe"

Use the remote to explore color-coded musical genres in search of the music that matches your mood. I haven't seen a playlist tool, but just being your own dj with music from all times and genres is highly fun. After it finishes the song you are on, it moves along the web to the next one.

After a few songs it puts up a screen that you can move around but recommends you register. You can go with a free membership, but I paid the $15 for a three month premium membership and got the ability to make favorites and to listen with higher sound quality. I'll be using this at home I'm sure.