Wendy,
My company is bThere Media and we do Smart Car Advertising. We have Smart Cars available for advertising at any time in any US city. Our typical campaign includes a full wrap for the car and a 4' x 6' backlit sign that is attached to the back of the car. We can also equip the cars with flat screen TVs, game players, etc. Call Carl Natenstedt @ 512-461-2301 if you want to discuss specifics or you want me to email you a marketing sheet with pictures, etc.