Here's an interesting camera mount for the RC Helicopter hobbyist. This is being sold for the 'Camera Stand' only, but was designed to adapt to different small 450-500 sized helicopters. Images show cameras as small as the GoPro HD Hero up to small HD Camcorders. There's also a tilt mechanism shown in the listing, but i'm not sure how that ties in to the controls. Here's the link to the Camera Mount Stand: Camera Mount Stand for 450-500 Sized Helicopters
I'm not at all experienced in RC Helicopters, but there are some over seas 450 sized helicopters ready to fly running for around $200 bucks that might be able to complete a fun GoPro flying rig. I've never flown an RC Heli, but I can imagine the damage it can cause to ones camera. For myself, I might be willing to practice on something as robust like a GoPro (those things have fallen from space and survived), but not sure if i'd ever have the huevos to fly a full Canon DSLR on a RC Helicopter. Fly at your own risk... Here's the link to the cheap 450 Sized Helicopters: RC Helicopter 450 Kit ready to Fly - Just needs Batteries