indeed, scotty, we do owe you something. I think at least a couple of beers, whenever you are somewhere an iliad owner lives

(or do you want to open a paypal account?)
Next thing on my file format list would be rtf, but this is already covered with easy pdf transformation.
There's something else i've been thinking about
:
Most digital cameras use sd cards nowadays. Should it be possible to aquire content without computer in between?
There are two problems when simply taking photos of book pages / documents: You can't easily flip through images (yet) and the pages are usually quite skewed.
Deskewing by pointing on the 4 corners should be sufficient for the beginning, how to do a prettier deskewing by recognizing lines and their shape, i don't know (yet).