As I commented in another thread, the best way I could ever see to describe your amazingly simple robot came to my from the quote bar:
"... simple things can amaze me." - Andy Baker
Since I'm a programmer, I'd love to add to Adam's questions (please?

):
How much feedback to you have to control the drive train? The arm/grabebr mechanism?
How do you control the Hybrid mode? What commands does the Robo-coach (if used, but I assume you do) give?
Thanks, and congratulations on building an incredible robot. I hope I / we can go to Atlanta this year, if just to stare at your (and others, of coutse) robot(s).