Nike is always coming up with something.

Nike+ FuelBand tracks your activity through a sport-tested accelerometer, then translates your moves into NikeFuel.
FuelBand tracks running, walking, dancing, basketball, and dozens of everyday activities.
Set your Daily Goal and Nike+ FuelBand tracks your progress, lighting up from red to green throughout the day.
Get to green and you’ve hit your goal.
See how many days in a row you can get to green.

I bet it is only a matter of time before someone buys this nice little gadget just to rock.