For me, the answer’s probably “years ago”. It’s something that’s completely exited my life, for some reason. Probably because I just don’t seem to ever get stuff on paper any more. Not stuff that needs to be on my PC, anyway.
Well, an Industrial Design student at the University of Cincinnati, Kyle A Koch, has come up with a big cardboard construct that can be used to scan stuff in using your iPhone. You’ll also need some decent light, and the picture quality won’t even approach ‘medium’, but hey – you never know when it could come in handy.