Here's a link to a company which offers a very cool product (or rather, multiple products of the same type) designed to automate the process of producing multiple digital photos which can then be stitched together with special software in order to produce photo files which can be enlarged to enormous sizes. The Gigapan Epic (for point & shoot cameras) and Gigapan Epic 100 (for DSLR cameras) are robotic camera mounts which automatically move the camera from position to position and then take photos --- even thousands of photos! --- which are subsequently stitched together into a single high-resolution image.
Potentially, such a system could also be very useful for turning reasonably affordable DLSR cameras into repro cameras for producing giclee and photo reproductions from large paintings or even outdoor murals. To say nothing of landscape photos, city skylines, etc.