While doing an unrelated search, I browsed into Publications by Wolfgang Heidrich and started reading his paper entitled The Design of an Inexpensive Very High Resolution Scan Camera System. It's a very interesting idea: they modify an inexpensive Canon scanner to use as the back for a large format camera. Ultimately they are able to construct images with over 122 million pixels. Pretty damned nifty. I've even got one of these scanners on my shelf... Hmmm.
Addendum: The paper above cites research by Yang of MIT on a similar project which used a flat bed scanner as the imaging component in a camera to acquire light field images.