He actually goes by Master Zap, if thats the same Zap. He basically hails from theforce.net where he did FX work for some starwars fanfilms. I recall seeing his work on a few fan films back in 2001 if I'm not mistaken. His mentalray knowledge is first rate, but he basically teaches MR from MAX. He not much of a maya guru from what I have heard. Maybe he has changed.

Edit: I missed jay's post talking about him. Yeah, it's Master Zap. Forgot about his involvement at CGtalk. I actually got into an argument with him regarding the 2007 transformers movie.