Brin announces Google Glass Explorer Edition - limited to U.S.-based I/O attendees, not a consumer product. This is $1,500, Google's taking pre-orders now, won't ship the actual units until early next year.
The current Google Glass prototype with its asymmetrical design "weighs less on your nose than many sunglasses" according to Google. Lightness was a key design concern as was comfort and sturdiness - you can wear the Google Goggles while playing sports, etc. without breaking them.
I missed how the whole point of this was to deliver a package to Brin onstage - so now some bikers took it from the skydivers, handed it off to a rock climber guy who rappelled it down to the third floor, now it's on another bike and onstage!