Excelente tutorial Don Vecta.
I gotta say, indeed his headbutt is punishable as hell, but still honda is not supposed to be spamming hb blindly. IMO its a nice poke that should be used cleverly and as a well timed anti air (jab), it also takes a nice amount of chip damage.
One thing missing in the vid:
Down-forward Roundhouse is cancellable into oicho or sumosplash, its lovely to be tricking folks into those. Also i wonder if the new ultra (720 motion) can be buffered in it also for SSF4.
Overall, a nice vid. I main Honda and found it quite interesting and will be incorporating some of this knowledge into my game.