Revolution Interface

[Canyarion]

The rev controllers does NOT use gyro technology. That's what a lot of people thought when Nintendo invested in that company.
Nintendo themselves have never used the therm.

Originally Posted by IGN

interacts with a sensor bar placed above, below, or near televisions. The bar contains two sensors that communicate with the controller using Bluetooth technology. The marriage transforms the pointer into a virtual wand of sorts, enabling users to move objects and characters in games simply by moving the peripheral. The sensors read the pointer's every move in real-time space. They can detect up, down, left and right motion, and also translate forward and backward depth. The controller's sensors also recognize twisting, rotating and tilting movements. In short, any motion made by arms and wrists can be translated to Revolution games.

http://revolution.ign.com/articles/670/670513p1.html

There you have it. It's the sensor bar that does the complicated work. The controller only contains a few transmitters. At least that's how I understand it.