One request: I'm sure comparing two cameras for a highly demanding crowd isn't easy, but is it possible to add a video comparison as well? The big problem with DSLR video is that they line-skip, and the resolution is isn't on par with what one would expect from their sensors. But maybe the higher resolution of the E might make the resulting images sharper - that would be stellar.
On the other hand I would also love to find out if the 36MP E trumps a 645D or S2 as far as large prints are concerned.
I plan on doing video comparisons, but I'm working the stills side of things for the moment. It might be a couple of weeks yet. Some quick and dirty video clips that I've shoot look very nice.
Llyod Chambers has done a comparison between the D800 and the Leica S2 and finds that it is somewhere between and raw and a slight win for the Nikon. The D800e will therefore likely win in almost all IQ counts.
The D800e is medium format's worst nightmare. Resolution matching cameras and backs up to 40MP, superior high ISO, equal colour depth, lighter weight, availability of hundreds of lenses, availability of stabilization, live view, video, much higher frame rates, and all for an integrated body costing less than US $3,300.
BTW – Anyone in the Toronto area who owns a Leica S2 and would like to do an S2 / D800e comparison with me one day, drop me a note.