video://www.youtube.com/watch?v=cC9cdIUiOqU
Woohoo, I need a unicycle like this one!
The UNIQUECYCLE is an upgraded GEN2 unicycle featured below. It has been boosted to a 60V system yielding in excess of 1000W. The NiMh battery system has been replaced by SLA technology. The SLA is lower cost, easier to recharge and handles regeneration and peak current demands effectively. The higher voltage results in higher top-end speed. Speed overhead is critical for safety in order to maintain balance during road disturbances at high speed. The Uniquecycle will be getting a total controller redesign shortly with advanced digital low-noise sensors, and a more compact control box design with more safety and circuit protection features employed.

Other interesting stuff at Zedomax.com: battery system, circuit protection, gen2, high speed, low noise, nimh battery, regeneration, sensors, sla, speed speed, unicycle