Yep, there sure are. One rather famous individual is T. V. Raman, I believe who currently works at Google Research.
It's amazing how far screen reading and other technologies for the visually impaired have come along, more of a reason for me to consider accessibility over aesthetics when doing web development.
I seem to recall him -- or someone -- appearing on a Google Talk video on emacs' org-mode. I don't remember whether that was peripherally or as a presenter.
I was friends with a blind web developer years ago - I remember him telling me that he had the computer "speaking" so fast that a tech fixing his laptop thought it was broken.
It's amazing how far screen reading and other technologies for the visually impaired have come along, more of a reason for me to consider accessibility over aesthetics when doing web development.