Yeah, I agree. Mark's my favorite guitarist(and really my inspiration for taking up the guitar) and he'd be an awesome teacher. Though I would be nervous about messing up.
Perhaps, but guitar is a very tough thing at first. I'm a beginner(took it up in December of 2004) and had a very tough time at first, just getting used to the fret board and all. Needless to say, it is alot tougher than it looks.