If you look at the picture of the rb7 floor taken at Monaco here
http://scarbsf1.wordpress.com/2011/06/0 ... -analysis/
it is easy to imaging that they are turning the entire top half of the car independently of the wheels as the car corners so it always faces into the corner. That might be why the red bull is so mighty in high speed corners. It doesn't lose downforce due to slip angle. It would also help the change of direction. I think they are steering the whole car aerodynamically. On board shots seem to indicate the front wing is moving laterally compared with the tires. Imagine the entire top half of the car sitting on a record player. It looks like that center section spins.
Joel