The two bottom heatsinks right below the cooler don't actually cover anything, must just be more for show than anything else.
I'm pretty sure its just a matter of time before a GPU cooler comes out from Zalman that is built for the 8800 series exclusively, I don't think the VF1000 was actually made for the 8800 series but is more geared toward a broad variety of cards. I would assume they will eventually come out with something a little more heavy duty to cool off the hot 8800's and give people a little more overclocking room