Bill,
I record in-flight with a Sony GV-D800 editing deck (they call it a Video Walkman). Super 8 tape, digital, works fine with a remote control and a lipstick camera. G-load has not been a problem, at least up to 5. The "brick" shape is easy to mount in foam inside a small plastic box.
As an editing deck it works great, plus you can input old analog tapes from your VCR in one side and pipe digital to your computer out the other. Very useful for getting those old family tapes onto CD or DVD.
I've been using a camera from the Helmet Cam folks, but be warned that their harness isn't very practical for placing the camera at a remote location. I usually mount mine on my helmet (w/ super velcro) to fly acro in a Maxair Rocket. Downloads at:
http://www.perryhillauto.com/downloads/downloads.htm
Dan