Lee Iacocca
http://en.wikipedia.org/wiki/Lee_Iacocca (for those who have never heard of the man)
--I think he'd have some interesting stories if nothing else given his time in the business. I also think it's a 'never going to happen' but whatever
Jay Kay again... I find him amusing. Even in the Lamborghini drive back in Series 3, he was entertaining. Truly passionate about the cars, and that's a wonderful quality.
A rally driver of some sort, to see how they stack up to the F1 drivers... maybe S?bastien Loeb... or Tommi M?kinen or Marcus Gr?nholm if they can't find an open Wednesday for an active driver. They've had a few rally drivers around the show in the past.
As a greedy option, I'd love to see Jackie Stewart's time in the Liana... and to regale a few stories from the past.