Wounded QR Codes
The bit at the end made me happy - I didn't know QR codes code be that large.  I wonder what the practical maximum number of bits is?  I just tried the ones on the Wikipedia page (http://en.wikipedia.org/wiki/QR_code#Storage) - the one that's 5 alignment blocks wide scans, but the one that's 7 alignment blocks wide does not.  I assume my primitive old phone's camera lacks the resolution for it.  Unfortunately the captions are wrong - they both say 177x177.