CHDK is amazing, not least because it runs on such a wide range of cameras. I'm doing some book scanning at the moment using a home-made scanning support, Tesse

CHDK is amazing, not least because it runs on such a wide range of cameras. I'm doing some book scanning at the moment using a home-made scanning support, Tesseract OCR software, and an ancient A570 camera running CHDK so I can get a remote shutter. Setting the whole thing up was far less painful than expected.