Before yall create a mob and storm the B'more docks, go to smart.com
The USA site still has 2009 info...but go international (UK, etc.) and they have 2010 info up, all petrol engines are PREMIUM UNLEADED.
That is, unless they plan on making the regular unleaded for the states only?
Plus, I see no press stuff on the interwebs and usually when something is changed at smart, someone gets news of it.