All device drivers must be 64-bit. Libraries only need to be 64 bit if a 64 bit app needs to use them. So it looks like Windows 64 is going to contain both 32 and 64 bit dlls, which is a good thing. I guess the 32 bit dlls are executed through the wow64 mechanism as well.
I guess I should have read a little before my initial post. Ah well everyone sticks their foot in their mouth occasionally. :)