I realize cost is important, but it seems to me that the Yellowbrick
technology used during the Chilean Gran Prix offers much, much more
than SPOT tracking. With Yellowbrick I was able to follow the strategy
of the competitors, with SPOT I wouldn't get details like position,
speed, altitude and vario every 20 seconds and so know the strategy.
The Yellowbrick rental cost isn't that exhorbitant for a National
event, see he http://www.adventuretracking.com/airsports.htm I
understand that SPOT wasn't made for pilots, but if they understand
they have competition, maybe improvements would be made.

-John