Called "Digits", these affix to your knit gloves, and allow you to tap, swipe, and pinch away, while keeping your hands warm. Just in time for the wintery months! :P
Digits conductive pins won't make a fool of you in the cold -- Engadget
I prefer to use my iPad indoors or in the car if it's nippy outside, but if it's cold enough to wear gloves and you gotta get your tap on, these appear to be a smart solution.