Mirada for a Microsoft commercial which was never used. It's a hovering, "dust buster blimp" design. It is made of super-light materials and floats around with the aid of a hydrogen bladder and fans. It maneuvers itself through the air with tentacles lined with macro cilia, oscillating at extreme speeds. A blinking icon on the side announces the mode; repair mode, in this case.
I guess it isn't really very practical. That's probably why they didn't use it.