So has anyone seen this before? I don't think it's new, but some of the writers/actors from Mystery Science Theatre 3000 have a website called RiffTrax in which they're selling audio commentaries to new (and old) movies that you can play in sync with the rented movies you may own. They also allow user to upload and sell their own commentaries. You can buy DVD from them as well and wait the few weeks, if you're not techno savey
Sorry, Joel's not involved... still pretty funny.