To answer some of your questions regarding room for graphics cards in the RV02 and FT02. It was designed to fit cards as long as 12"
The reason we mentioned 10.5" in our literatures for many of our cases is that we were under the impression that neither GPU company will go over that length for consumer graphics cards. Apparently ATI has decided to break that unofficial rule, which is unfortunate, the actual PCB of 5870 is likely still only 10.5". The non-functional air vents with the plastic cover is responsible for making the card longer.
We are still waiting for confirmation from ATI regarding the length of 5870x2. Even if it is indeed 12" and touching the fan grille, you shouldn't need to worry about the airflow getting divided as the 180mm fan is bigger than the cards (plus there are three of them inside case).
I will give everyone update here as soon as I heard back from them!