I just picked up one of these for cheap:
http://www.epinions.com/cmd-review-1E1A-BF22A79-39F7BDD3-prod2It's new-old-stock (uses the good old-fashioned gameport).
I thought it might be interesting to use the accelerator trigger it has on the bottom (it's like a gas pedal for your finger!) and hack it into a control panel...