Cool stuff, David!
As a side note, I'd be very interested to learn if this PhotoSphere(tm) was shot in video or with stills.. It is fairly error-free (notes the top left of stage).
What's especially notable, is that none of the people *right next to you* seem bothered of your actions. Very interesting! Prior to this latest approach, it was almost impossible to shoot something like this in a crowded area without getting a lot of gawks. I suspect that this capture approach and ICE's latest video-based rendering may mean very cool things for the medium. Expensive things, but very cool things (;
In any case, great work! Thanks for sticking with it, Microsoft, Photosynth, and Team!