Pro matte painter David Mattingly has started a class that he's inviting users of mattepainting.org to participate in. No credit available, obviously, and you won't get the lectures, but he'll critique and grade anything submitted to the homework threads over there.

He may not thank me if he gets 100 new students in the first week, though, so I recommend only participating if you're really serious about getting through the entire class.

http://www.mattepainting.org/vb/showthread.php?t=6264