Thar be more free booty on the horizon ARRRR! This link came up in IRC the other day (thanks asunder).. check out Seeqpod It's basically a web crawler that searches for mp3s hidden out there on the web and allows instant playback via a flash player and playlist engine. Want to hear Trivium's cover of Master of Puppets? type it in. Also includes a cool rolling list of what it's finding so you can check out stuff at random.
And for the piratin' type ARRRRR! it also lists the URL of the mp3.. the only thing it's really missing is bitrate info...
Enjoy