Not sure if there are many traditional or matte paint artists here or people interested in that stuff. But I am a regular over at cgtalk and we are trying to resurrect that forum, so drop by and check it out and contribute if you can. If for nothing else check out this great eye sketching tutorial http://www.cgtalk.com/showthread.php?threadid=227727
I may be doing a tut on some matte paint techniques but that wont be for a while.