"The first High ISO test of Nikon D4 with D3 published at mgphotographer, Before you jump to any decision please note that the D4 used in the comparison is loaded with a BETA firmware, so final firmware version of Nikon D4 may have some better performance, the images taken with the
D3 (12 Mp) are in the left side and the crop is somehow “smaller” because of the resolution difference between the 2 cameras."
Imaging Resource goes deep down on some aspects of the D800/E, like that of the missing (or not so missing) antialiasing filter:
"Anti-aliasing. Like almost all Bayer-filtered cameras, the Nikon D800 includes an optical low-pass filter, sited just above the image sensor.
The D800/D800E is finally upon us. Most of the specs have been know beforehand, but still, some surprises managed to escape the leaky chorus. The cameras can already be pre-ordered at various places. (D800 and D800E preorder links at Amazon, D800E at B&H) We have included press releases from both Nikon UK and US.
First we got something titled 'Nikon D4 and D800 shootout' at NikonUser.info. Its more of a D4 user review, loaded with both cropped and full samples. As always, of special interest to us peepers are the 6.400 to 25.800 iso samples: