Yeah, I'm using one of his songs for a short I'm entering into a contest. Just remember that none of it can be used commercially (so festivals are cool, but theatrical or DVD distribution is not).
Mobygratis started about 3 years ago and even though you need to apply for a different licence if you're going to use the music commercially, it is always great when artists give back to the indie community.
Have you checked out hitrecord.org?
It'd Levitt's way of collaborating with people around the world. It's pretty interesting and they just released their first dvd-book.