Here's another example. http://www.crucialthought.com/2007/04/03/freeplaymusic-license/ This blog post is from the blog author, Chris, who talks about This site: http://www.freeplaymusic.com/ I think it's important that you read his article because he talks about his efforts to clear up the copyright issues and educational uses for this music.
Once you've read Chris' article, go check out the site. GREAT STUFF!!!