I'd pay a lot of money for that for myself. Take this bracelet design: http://img2.etsystatic.com/il_570xN.309914418.jpg http://img2.etsystatic.com/il_570xN.30

I'd pay a lot of money for that for myself. Take this bracelet design: http://img2.etsystatic.com/il_570xN.309914418.jpg http://img2.etsystatic.com/il_570xN.309914418.jpg Replace the washer with a small system: micro controller, battery, bluetooth, a handful of LEDs and a motor for vibration. All of the heavy lifting, computational wise, can be done on a desktop or mobile device.