Tested.com has a video testing the GoPro Hero+ WiFi camera. They are running an obstacle course inside and out, shooting targets with NERF guns. It would be nice to be able to create an obstacle course that had multiple sensors on multiple targets to calculate a score based on accuracy and speed, much like a police training course (Add points for shooting baddies, subtract for shooting babies). Since you know plenty of people who play NERF (Ben Heck's Roomba Nerf Dart Collector). The sensors could be wireless so that you can place them anywhere. I don't know what system would be best for collecting all the data.