I've ordered it as well should receive it today or tomorrow. (gigabyte version)
Don't like having to install vista, one bit though :[
So I might just try it, see how it goes and then revert back to XP.
I´ve read a test, it showed that HybridCrossFire and HW-Acceleration worked only in Vista, not XP. It was an early driver though. But as I know the 690g support under XP from ATi... There is a chance that the 780G stuff will work as it should only with Vista.
Hungary