At least in the part of the demo I watched, I didn't hear his screen reader. But I know that it's difficult to make a screen reader's speech output audible over a VoIP program like Skype, without causing a nasty feedback loop. The last time I attempted it, several years ago, I had to use a USB audio device in addition to my computer's built-in audio output, with an analog audio cable between the two.

By the way, what version of Windows do you use, Parham? I ask because it looks like you're using the Windows Classic theme, which isn't available in versions after Windows 7 as far as I know. I know that using this theme used to improve compatibility with screen readers like JAWS and Window-Eyes, but as far as I know, it doesn't matter with NVDA, though I suppose using the simpler theme would still reduce CPU and memory usage.

Yes, I'm using Windows 7. I use that theme because my screen reader is more responsive the less CPU and memory usage I have. So for example, if I open a heavyweight IDE, the fact that it's using so much CPU will make my screen reader lag.

The idea of a blind person investigating is one strong meta metaphor.

Very cool. Thanks for the links!