The Segwii

The Segwii is a self balancing robot. Yes, another one, only this one can e controlled via WiiMote. The Segwii can function in stand alone mode, wich offers only the ability to balance, or it can be tethered. When tethered via usb to the laptop, it can be remotely controlled using the WiiMote through processing. Sadly, the video above doesn’t show any WiiMote action. Lets hope they continue the work to incorporate a direct bluetooth connection to the bot.

This one seems to be pretty sturdy, though he does mention that temperature changes can throw off the internal gyroscope. This one seems to be similar to the Arduway in terms of how smoothly it keeps balance. The miniature balancing robot has them both beat for pure goofyness though.

http://hackaday.com/2009/01/29/the-segwii/