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Damn that's some serious wind. I agree, it may not work in that. But, if there's a more efficient design, people are going to try to market it as a cheaper knock off. May the best design win.

I would bet anything that Kamen already has another lab version of this (2/4 wheels) that goes up stairs and curbs just like his 6-wheel iBot. This one could probably go strait off a curb, and through small potholes, but that's it.

Any low-tech three wheel design would be a total mess with curbs, potholes, etc. And of course it could never navigate stairs.

"I would bet anything that Kamen already has another lab version of this (2/4 wheels) that goes up stairs and curbs just like his 6-wheel iBot."

He's already patented it, I've seen the filings. It uses two "wheels", one on each side. Each "wheel" is a triangular affair, with a wheel on each corner. It rides along normally with one wheel (on each side) on the ground, and climbs stairs by rotating the entire "wheel" assembly. I think there are some ATV designs that use a similar concept, but with a four rather than two wheel design.