Trying to use an iPod Touch with gloves on is like trying to program the microwave while wearing oven mitts. Here with help are Dots Gloves:
Dots Gloves offers simple, affordable gloves adorned with metal dots that enable use of the iPhone, iPod and iTouch without direct finger contact. The smooth, curved surface of the dots provides completely safe, scratchless use.
They even let you spec out which fingers (thumb, index, middle) you want the dots on, and at ten bucks a pop they're dirt cheap.