Keri Wilk has published a set of his shots using the Nikon D800 in the Nauticam NA-D800 housing.
Keri at Work in the Carwash Cenote
"Although having prototype status, the housing looks and performs like a finished product. The first overall impressions have been almost entirely positive -- a dedicated ISO lever, shutter and aperture dials that are easily accessed and operated without removing your hand from the grip, a directional pad that allows diagonal movement (no more "staircasing" to review the corner of an image!) and other new ergonomic improvements over past housings have stood out during the first few dives with the housing."
D800 Ready for a Dip in a Cenote