I used ABBYY Finereader around 8 years ago to OCR an old EE textbook, and I was really impressed with the results back then. I haven't heard any mention of the company since then until now, so it's interesting to see that they still seem to have some of the best available OCR tech. I've since tried to use Tesseract for small OCR jobs several times over the last few years, and have never found its results to be even remotely usable (which is a real shame).