Found this page today offering 93 free music clips available for use in podcasts (and I imagine other non-broadcast type uses) on the Indiana University website.

The quality of the clips is questionable, very Garageband sounding, but there are quite few gems in there if you look hard enough
Download 93 Free Music Clips for Podcasts

Some of the tracks I like are the Indian flavored ones like this;
Lone Rider

Some of the funky guitar tracks are interesting as well;
Wow Wow