"Cordgo is a one hand operated cord adjustment and storage accessory. Cordgo's durable, lightweight design fits in the palm of your hand to deliver cord control. Adjust your cord to the perfect length every time. It's fast, easy storage saves you from ever having to deal with tangled cords again. Cordgo was designed to perform as an integral component between cord and digital device. Cordgo is ideal for anyone who enjoys listening to music while jogging, biking, lifting weights... or just walking about town. Cordgo not only eliminates the tangling and physical interference of a cord, it also provides the luxury of quick and easy storage. Clip it to your belt, arm band, key chain, car visor, bag strap.... or just slip it in your pocket." Sometimes the best ideas are the simplest ones. I've seen variations of this product before, but this one seems particularly well thought out and optimized for certain scenarios. My wife saw it, and was immediately excited because her headphone cable often get tangled when she works out at the gym. Needless to say, I ordered a few of them. ;-) They have a "buy one, get one free" special on right now as well. None of us have Zunes yet, of course, but when you get one you'll have headphone cords, so...