An opportunity for the O and AR communities to share common ground:
http://gearjunkie.com/adventure-racing-letter
The orienteering clubs could lend a hand to what the author of this article lists in points (3) Vet the Course; (8) Good Maps; (9) Clues.
There is a followup at
http://www.adventureworldmagazineonline.com/advent...
I would add "hire an experienced orienteering club course designer to design a course where route choice is a significant determinant of race outcome", or at least makes it interesting.