I cant remember how I got to his video clip, but I believe Ken Crawford is really into this.
I found a video on Vimeo . I dont think he uses the helicopter version, but he flies a plane ( skywalker ??) and a GoPro on the nose. Looks pretty sophisticated as I believe he uses goggles to see what the plane sees in real time.
This clip is called " Sky Walking the Sierras"
http://vimeo.com/48095352
Just found this one in his list of videos....... a very small quad copter! 86grams with cam!
http://vimeo.com/38737856
HTH
Cheers
Bartman