[Arkie2]

Hmm. Put bigger wheels on it and go four, oops, two wheeling? I think the issue of balance is addressed by several high speed gyros, hence no draw on the battery as long as they're spinning at adequate speed. I can actually see a lot of applications for this thing on campuses, military flight lines, postmen, warehouses etc. I'm not sure it will revolutionize city transportation though.

[sam_paine]

I think the issue of balance is addressed by several high speed gyros...

What I read was that they're solid state attitude feedback sensors, not mechanical gyros. The way it works is it accelerates the wheels in the direction you lean, forward or back, so you continuously "fall" against the angular acceleration of the wheels.

Which again brings me to my, and aparently Voltage's concern...what if you break the nice control loop with a rock or pothole??

It's just another inherently unstable platform, like the F-117 or B-2, that has been "made to fly" with the magic of DSP's in a feedback loop. Problem is, this thing only has $100Million in firmware, not Billion$ like the others.