After Qmotions' real splash onto the exergaming scene a few years ago at CES for their Golf product, I think their Qmotions-FunFitness Full Motion Game Controller slipped passed my radar. With the small blue circular attachment that can be added to most home recumbent stationary bikes (not to be confused with regular recumbent bikes-ha), and the adapter for your game controller, racing games become human powered. The faster you pedal, the faster your car/hot rod/ORF/BMX/ etc... goes.
I'm not sure if I get their generic title of "Full Motion Game Controller" for all their controllers as they do not enable full motions. I think other similar bike controllers like Cateye Gamebike are good but I'm quite taken by the Gamercize line of products as it allows you to play many more games and not just racing type games.