Air dog - quadcopter
I love a quad copter and as soon as they come down in price for one that won't blow away in the wind, I'm getting one. Air dog's clever. It's autonomous and follows you while you're out doing extreme sports/riding a bike/walking to the shops/etc.
A neat idea. The autonomy is interesting. All that shit that we litter our streets with will be a bastard to avoid. You're going to have to be a pretty smart quadcopter to avoid lamp-posts, trees (scattering of ultrasound/radar?), road signs and all that.
Watching with interest!