Just drove past the local Chevy dealership here in Portland Maine and there is was a fully loaded 2007 Silverado. I didn't really look it over it's dark out but there out and they look great so much better than in any of the pictures we've seen so far.
There is a company called ZAP that converts the smart cars to american standards they are very expensive but you can buy they here in the states here is a web site for a california dealer http://www.bigkidtoys.com/smartCAR.html
i doubt this is an ss at all because they are supose to be getting a new front and rear design for 2007 anyways along with some other improvements but very unlikely that it is and ss