Via DSFanboy:
More details HEREQUOTE said:...thanks to the power of homebrew, you'll soon be able to turn your trusty DS into an etch-a-sketch. This new DS motion card plugs right into the card slot and includes a 3-axis accelerometer and single-axis gyroscope functionality for a rich motion-sensing experience that you can take with you. But what can you do it with? Just think -- tilt sensing, gesture recognition, twist functions ... the possibilities for applications here is huge. There are already a few apps on ndsmotion.com that have been designed to work with the sensor card: the aforementioned DSaSketch, and two other simple games, Spout and Water Drops Tilt...