Through Gizmodo amd Motorcycle Mojo found this unicycle/motorcycle hybrid, the Uno, recently shown at the Toronto Bike show. The inventor is a bright 18year old Canadian guy called Ben J. Poss Gulak who put the bike together without any big company R&D funds. It is two wheeled, with both wheels side by side, steered totally by moving your body weight around and gyro sensors, with electric battery power. Underneath the bodywork is extensively rebuilt Yamaha RI frame.
As a toy and a stunt show special fine but wouldn’t the perceived instability would put off both existing bikers and car drivers – maybe Segway owners would see it as a next step up from their machines? So its niche, but still glad someone has done it (and I would certainly have a go on one if it enters full production).