I tried for a while to get a video camera installed on one of the remote controlled balloons. Even stipped down it was too heavy. I wanted to see if I could get photos from the air using it, but alas, no luck. The balloon was great, but just like the helicopters, they don't tolerate any wind and are primarily good for indoor work. More powerful planes etc would be the only way to do it.
Have you checked out the videos of a guy who mounted an x10 camera to a estes miniature rocket? The videos are a riot. There was also a recent posting (I can't remember where it was) that showed a remote control plane with a camera that was on a gyro so the view was from the pilot's position. It was awesome.
I am going to work on that sometime.