The Perspective Aerials HDSLR “Platform”.
I saw one of these four bladed helicopters at Cine Gear Expo 2010, but the guy said it was broken and he was looking for parts. I stumbled upon this video of a similar helicopter rig. The footage is pretty sweet. It does not look like they have any type of video transmitter hooked up. I would imagine that a transmitter would be possible to send picture to the operator. Perspective Aerials claims this thing only has a 24″ footprint, is Eco friendly (Battery Powered) and is safe. I am not sure about the safe part. They only have a contact email.
**Update, got a response from “AJ” he passed along this updated Vimeo Video of Footage Shot with a Canon 5D MK II.