Well, here is another car. The smart car for two, shown above, is getting and incentive boost.

From the article:
"smart USA will allow qualified consumers using the federal rebate to purchase a new smart fortwo for as low as $99 a month. The smart Fortwo will qualify for the highest voucher level of $4,500 upon the trade in of an eligible vehicle. This special financing was designed to provide an additional monetary incentive for consumers to replace older vehicles that guzzle fuel and emit high levels of greenhouse gasses with new, highly efficient ones like the smart fortwo. It will launch later this summer when the rebate system officially takes effect."

See the related link for more information and photos.

-- Another note: This car weighs more than a Toyota Yaris and the Yaris seats 4 people. If you are into an Eco-Vehicle, this is not the only option that is better for the environment. Don't forget to look at the Honda Fit as well. All of these cars have similar gas mileage.