Greets!
I'm in the process of putting together a website that is intended to serve as an archive of quality art, music, and sound effects that are available under a GPL-compatible licenses (including several Creative Commons licenses) so that open source game developers can make use of it. If this sounds like a cool idea and you happen to have old music, sound effects, or art gathering dust on your hard drive, please consider uploading it to the archive -- particularly if it's something that won't otherwise see the light of day.
We're still in beta and looking for some usability feedback, so if you run into any problems or find anything annoying, please reply here and let me know.
The site is here:
http://opengameart.org
Drop by, poke around, and, if you're up to it, donate some content.
Peace,
Bart