Via Digg comes this very well crafted complex search to help you find "free" music

Use the following search including the quotes. Replace the <insert band name> part with you guessed it, the name of the band.

"<insert band name>" last modified mp3 "index of" -html -htm -php -asp

The search results should give you entire folders of music. This is actually an old trick, but it still works.

You can also replace the <insert band name> part with other keywords and change the file type mp3 to mov, avi, rm, etc... to find movies of all kinds.