Seeqpod is cool.
Basically, it’s a music search engine and flash-based player. Apparently they don’t believe there are any copyright issues as they don’t host the tracks themselves but just link to them.
It works really well.
For example, I really like the music on this cool Sprint ad, so I loaded up seeqpod and did a search for “architecture in helsinki”. Sure enough, this was one of the ninety-four results that came back:
They even have links to the video (which is very cool.)