Hmm, I must be blind or something, I can't get it to work... I suspect it might have something to do with the fact that if I stare at something for 30 seconds my eyes go into the 3d dot sterogram mode...
Benito of Denver, Mark II, oneday maybe I'll get to go back to the other side of the glass.
If I let my eyes wander away for even a moment, the illusion is lost. Don't look at your mouse pointer when you move it, that's what lost it for me. It lasts for over a minute if I steady my gaze on the dot the whole time.