I have started researching the Zip Car, car sharing model, and what it might take to bring it here. I can think of two places that a Zip Car station might be used and embraced...... One at Motorwheel/Prudden Place, and a second downtown between Arbaugh, Stadium, and Abrams.
Daimler Chrysler is launching the Smart Car in the US, at least in wider distribution.
Parking is an issue for downtown, and I don't think public transit can really solve the problem. Zip Car claims that for every shared car eliminates 20.
Its an idea I'm exploring.