Hype Machine Rocks
Ok the Hype Machine site is pretty cool. I can't believe that I missed it when I was doing my research on the web 2.0 state of the world.
The site crawls a specific set of blogs for mp3s and then aggregates them all and creates a play list so that you can hear it. They don't link directly to the mp3s and I think that helps them stay out of trouble.
The specific problem it solves for me is that I will hear some interesting song on the radio and if it is a new artist I can't find much of their music necessarily online.
Here's the band I was listening too on Live 105 last night - Great Northern.