Just found
this article from BBC Online, it's from June 1, sorry if this was posted already.
Features the SF Hummer driver:
"I have people flipping me off all the time but because I'm from New York, I get my ya-yas out that way and I get to flip 'em back."
And the Prius driver: "I bought the car because I get terrific fuel mileage and as an environmentalist, I want to do everything to break the nation's oil dependence."
Sounds like my pick for the next version of The Odd Couple.... 
Fred