I just tried it and here is my experience. The process of scanning the book worked just fine on my iPhone 3GS. The scanner opened up easily, scanned the barcode easily and put it directly in the correct field.
Here’s the little snag. I scanned the barcode of “One Morning in Maine”. It’s a book that’s already in the CMO Bookfinder. The scanning put in the barcode into the field no problem and I clicked “Look up Resource”. It did not find the version from the Bookfinder because the scanner put in the barcode number is 9780760526277. The number that would have pulled up the book from the bookfinder was the actual ISBN number 0-670-52627-4.
Any thoughts/advice?