Assuming that http://www.pdf2txt.com/ is the program people have been talking
about (there is another application called PDF2TXT which runs on Linux
systems, but I doubt that that's what's been discussed here), then given that
it's not free (you can use it for 30 days as a trial version, and it costs
US$35 after that), I doubt that the OCR engine behind it is going to be
available to anyone to turn into an NVDA addon (unless the author is prepared
to share the source code under an NDA and for the result then to be a paid
add-on).

See http://www.pdf2txt.com/eula.htm for the licensing details.


Antony.

--
I'm not impossible, just highly implausible.

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