Recommendations for best OCR program

By C.K. Sample, III

Hello, TUAW readers! I have a question for the collective. I'm wondering if you know of any good tools for performing OCR (optical character recognition) on an image, group of images, or a PDF. I'm not looking for something that works with a scanner. I've already scanned in many of the documents I want to perform the OCR on, most notably a 1932 first edition, second printing of E.E. Cummings' out-of-print travelogue of Russia, EIMI.

I was chatting with Damien about this, and he directed me to this helpful MacInTouch forum on the topic, but I'm still looking for a killer solution and, of the recommendations from the MacInTouch crowd, none seem to stick out noticeably. I'm going to see how the OCR built into Acrobat Pro 7 handles this task this afternoon, but thought I'd ask you all: know of any good OCR programs? Any open source ones? 

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