The 2009 North American International Auto Show in Detroit is lighter on new-car debuts than it has been in the past. That could have proven to be a disappointment to the most devout car enthusiasts. But if you look closer, there are essentially no SUV debuts here-and that leaves much more room for driver's cars. Enough, in fact, for us to come up with a list of five driver's cars that have made their first appearance here in the cold and snow of Detroit. The summer driving season can't come soon enough.