DocScanner iPhone is an existing app that turns your iPhone into an OCR scanner. You simply snap a photograph of a document, and the app uses built-in OCR (Optical Character Recognition) technology to extract the text from the document. The app then lets you save the text as a PDF for emailing or sharing with Evernote.DocScanner Mac is the OS X version of the iPhone app that works just as well and offers added functionality because it allows you to turn any camera into an OCR scanner. Simply snap a picture, import it to your Mac then drag it to DocScanner Mac's interface. You'll then be presented with a PDF version of the text that you can copy and paste into any editable document. The logic for bringing DocScanner from the iPhone to the Mac doesn't end with simply allowing you to use any camera as an OCR scanner. Porting the iOS app to Mac OS X allows DocScanner to take advantage of the OpenGL 3D accelerated graphics on your Mac. The results are much faster image processing and OCR extraction than you could ever hope to get on your iPhone.
More justification to upgrade to a new iPod Touch!
The app is $0.99 for the iPhone and $14.99 for Mac - but you can only buy it in the new Mac App store.