A quick fyi: The Free Music Archive now offers up over 10,000 free, high quality (and legal) mp3s. The archive is run by WFMU, the renowned freeform radio station that also runs the excellent "Beware of the Blog." All of the audio has been hand-picked by music curators, and you can use the audio pretty much however you want. That's because the archive houses songs that are either in the public domain, or released with a Creative Commons license. Nicely, WFMU has also developed a Twitter stream where they announce new additions to the archive. You can learn more about the archive here.