It uses the same Cortex A8 architecture as the current iPhone 3GS (which runs at a clocked-down 600MHz) but due to the smaller size, is said to not consumer any more power or generate any more heat than the current 833MHz generation.
Apple has made huge investments and agreed to large scale licenses of the ARM chip, even as they're moving ahead with their own, in-Apple chipset initiatives.
So, even if Samsung ships this baby in time there's still no telling if Apple will use it for a forth generation iPhone, likely to cycle around June 2010.
Still... Zoom. Zoom.