As mentioned in the SO question, the head of Google's accessibility team, T. V. Raman [1], is blind. I feel like this speaks volumes about the opportunities for disabled programmers on its own, and, though a bit cliche, reinforces the thing I love most about engineering--in many ways, this line of work is as close to a pure meritocracy as one can get. I hope Mr. Raman would agree that it seems fitting that someone who is blind himself would be sensitive to the needs presented by blind and low-vision users of computer software, and I'm happy he's around to provide guidance for accessibility features for a company like Google.

[1] http://en.wikipedia.org/wiki/T._V._Raman