Thought that more people than me can have problem finding audio, music and other content for their projects. Especially if they are competition entries of one kind or other.
So here are two really nice places I've found.
A dedicated site for this very purpose:
http://www.opengameart.org
Assets from the TIGSource Assemblee competition are free to use:
http://forums.tigsource.com/index.php?board=37.0
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