Inspired by the current Doonseberry comic series, I've been wondering if they might really be some recording opportunities for folk groups, providing GPS driving instructions for motorists.
For example the nautical singing groups could provide such informative voice clips as "Hard starboard!" or "Hard-a-lee!"
One of my friends, whose name I dare not mention, could contribute "Turn right! No! I mean left!"
For the long distance traveler, a chorus of "Five hundred miles, five hundred miles."