Lumiloop is a modular system of program and display panels that can be chained together to form a reactive bracelet. Each display module features a small 8x8 LED matrix, dynamically driven by an interchangeable program module. Curent version of Lumiloop sports a program module with an accelerometer, which interprets gestural motions of the wrist and generates illuminated patterns in response.
link. http://www.aeolab.com/?s=projects&p=lumiloop
It is Elise Co's company. She is also one of the John Maeda's students from MIT. You can find her works in the Creative Code book.
oops ~ just known that ~