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."
This reminds me of the unicycles in The Venus Wars (aka Uinasu senki).
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.