This video shows how to do a quick and surprisingly accurate OCR with a paper document and even off an iPAD. Using the Android Google Docs app you can take a picture of a document and send it to your Google Docs account. Google Docs will automatically do an OCR on it.
I think this can come in handy in meetings where you are given paper documents that you'd rather have in electronic format. You can also use it to scan in business cards to be added to your address book.
Up until quite recently I was using OCR pretty regularly. Google has an OCR program that's as good as any, which is to say it gets probably around 98% of characters right (this based on a couple of books I read using Google books, not an official statistic). While I can see it being very useful for longer documents, I really would be wary of using it for something like a business card without double checking its results, at which point I may as well take the time and type it in...
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