MojoKid writes "Nike+ FuelBand is a $149 wristband with LED display that tracks your daily activity, tells you how many calories you've burned, lets you know how much fuel you have left in the tank, and basically keeps track of 'every move you make.' If you think that sounds like a privacy nightmare waiting to happen, it pretty much is. A source directly connected to Nike reported an amusing, albeit startling anecdote about a guy who got caught cheating on his girlfriend because of the Nike+ FuelBand. 'They shared their activity between each other and she noticed he was active at 1-2AM, when he was supposed to be home.' That's just one scenario. What if the wristband gets lost or stolen? How much data is actually stored on these sorts of devices? And remember, you're syncing it to the cloud with an iOS or Android app."