Mr. R!
I have a workaround for you... A program called SnagIt allows you print anything into your choice of image files, much the same way you print a document into PDF format. The formats include JPG, BMP and GIF to name a few. You can then import the image file into Neat Receipts.
However, I have to agree with you. I say this with the caveat that I am NOT a programmer and know nothing about programming, but as a power user of just about every piece of hardware and software I own a good general rule of thumb is input = output / import = exports... Meaning if you can export it, you should be able to import it.
Additionally, for the NR crew.. A feature idea.... In addition to the PDF import... A NR printer driver would be really cool. That way you just print whatever it is you want to import.
Just a thought!!