The Black Friday bug bit me indeed. I ordered a digital pen called a Kupen Air.
The way it is supposed to work is it tracks what you draw on paper and stores it for later download to computer, or if attached live to the computer - acts like a tablet. It uses infrared and ultrasound in a receiver that is clipped to the paper you draw on. Let you all know how it works. I borrowed this cartoon from the current plutonium I am working on.