I recal seeing in many places (such as the show Prototype This and the recent chicago auto show) technology that allows you to track a symbol printed on an object as a 3d object on your computer. let me clarify. say you have a piece of paper with a smile printed on it. you tell the computer to track the smile. the computer shows a view from your camera input on its screen, and on the paper on top of the smile is a cube. as you rotate and move the paper in real life, it moves the cube on your screen, as if there was a REAL cube glued to your paper. I really think that is neat technology, and I was wondering where I could find out more about it?