There is a company in Australia that has combined your webcam with some interesting technology to allow for 3D images to appear on your screen triggered by a specific object in the flash.
The way it works is pretty simple in theory; the camera picks up on a shape that you've printed up and replaces it with an object.
The example below is a simplistic version of what you can do but the possibilities are endless.
Papervision - Augmented Reality (extended) from Boffswana on Vimeo.
