A quick update on the latest Nikon patents before the announcements start tomorrow.
Patent application 20100195221 is for a 24mm FX wide angle lens. Two examples are shown – one with f/2.8 and one with f/3.5:

First example (f/2.8) | Second example (f/3.5):
f = 24.698 | 24.400 (focal length)
FNO = 2.9 | 3.596 (aperture)
ω = 41.86° | 42.44°
Y = 21.6 | 21.6
TL = 74.298 | 68.898
Σd = 36.297 | 30.900
Bf = 38.000 | 37.998
Patent application 20100194974 is similar to the previously reported patent from Japan, but the US version has very detailed drawings of what appears to be an EVIL camera (there is still a mirror in the viewfinder):

Interesting: in all illustrations it seems that there is no shutter, or at least I cannot see one. The same patent application contains also a detailed drawings of the sensor housing (3:2 aspect ratio) and the lens mount:
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