Just read about this device that was announced at CES, and haven't seen it mentioned here yet (although it may have been...)
It's a $149 dual-camera book scanner that looks like it would work reasonably well (although paperbacks would be more awkward than the big, flat-laying picture books they show in their video, but still). It will scan as fast as you can turn the pages and get the scanner set back down on the book properly, and stores the images to an SD card for eventual transfer to a computer (from which, I assume, you could then run them through OCR).
Here's the link to the page I read about it on, which is a genealogy site:
Eastman's Genealogy Newsletter: Scan a book in 15 minutes
A link is included to the Ion press release. No date is given for shipments.