I'll be there. I started a roll-call thread in the track section:
BMW CCA allows that type of mount, but not all clubs do. NASA/PDA only allows it if you are driving solo and it is pointing away from the driver toward the empty seat (mounted on the driver's seat).
The cruisecam mount is pretty cheap (and works well), so I didn't see the point of making my own, which is what I was considering initially.
The gopro cameras are cool, but I am not sure if they would pass tech with just a suction cup attachement. They might require it to be tied/bolted it down.