Got the new Canon 7d a couple weeks ago, got to say I'm really impressed with it, and I'd highly recommend it if anyone is thinking about geting one... 18 megapixels 8 frames a second, and full 1080p video for really reasonable price.
I'm working towards getting my private pilots license, so I set up the 7d on top of the instrument panel on a solo practice flight last Saturday. I glued together a few mousepads and cut a hole through them for a tripod screw, then fixed the camera to that. The mouse pads kept the camera from sliding around. I used a full packet of trident tropical flavor gum between the mouse pads and lens for extra support. You could probably substitute the tropical flavor with winter fresh and achieve the same effect.
Audio was kinda tricky... I used a cell phone adapter and plugged it into the mic input on the camera... it took me a while to figure it out, at first I had my hedset plugged into the cell adapter, but all you could hear was me breathing like darth vader and no ATC, the trick was taking the battery out of the adapter and making sure it's in the off position (go figure right?) and plug it into to co-pilot headset jack. For better or worse though it kills all background noise.
Pretty cool shot as I'm turning to final getting passed by a VX A319 for the parallel!