A lot of local race tracks have a performance driving school where you can take your daily driver and hurtle it around the track with professional instruction.
However, more recently, several of the high-end sports car manufacturers have set up driving experience schools at specific tracks. For example, Audi announced their new R8 one and two day driving experience programs at Infineon Raceway in California. This particular program gives you the chance to drive a $100k+ car on a race track with professional drivers.
Now, Audi are not by any means the only ones that do this - Porsche and Ferrari offer something similar - but I wonder if these experiences just increase the longing for these high performance machines or at least sate the desire for a short while. I would love to get some comments from anyone that has participated at one of these experiences.