Bombardier's Hot Wheel
Anonymous Chris writes "Following the release of the Segway, Bombardier (the makers of such things as Ski-Doo and Lynx snowmobiles) announce their prototype Embrio - a motorcycle-like unicycle that uses gyroscopes to balance itself and runs off hydrogen fuel cells. It also features a landing gear that automatically retracts once you reach 12 m.p.h. The story is at Forbes. You can also get more information directly from their website."
but I can't see it being stable if you have to stop quickly. How would it resist the inertial force of a 200lb person being thrown forwards?
When I am king, you will be first against the wall.
The Wheelman is much cheaper and appears to have about the same risk level. Its only $1500 for a motorized device that you stand on and doesn't have anything to hold on to. I've seen these in action and the seem to work well.