Face it, people: scooter-like vehicles that move one upright person around at a speed just above walking will never catch on. The Segway is a joke, and taking the wheels away and putting in hovercraft technology isn't going to make this catch on.
In fact, didn't Hammacher Schlemmer start selling basically the same thing a year ago? "The most exhilarating gadget ever built" indeed. Give me a break.