My fingers are cold when using my computer - solutions?

Problem

I am a programmer and sit at a computer ten hours a day - and even though the rest of me is nice and warm, my fingers are as cold as ice. Are there any gadgets or tricks to keep your fingers warm while typing/mousing? Gloves do not seem like a good solution, since it hinders the movement of the fingers. I have sometimes put my extra laptop next to the mouse pad so that it vents hot air on the mouse - and that works. However it is not very practical, plus it only works for one hand (and not very well).