Well, I have not yet gotten my ATI5850 (out of stock everywhere) but I did get Rise of Flight to work very well indeed with SoftTH (Free software alternative to TH2GO)
These are from a game I played tonight with a few friends over on War-Hawks.net. I am using three Acer 22" monitors a 9600GSO as a primary and a 8600GT as a secondary card (the 9600 does all the rendering, the 8600 is just for passing the extra DVI-out to the third monitor).
First, the menu screen

An in flight shot before we met up with the hun

Another

And after I met up with the Hun :P

Some exterior shots



