Nikon has announced the top range D3x, that doubles the pixels count of D3 reaching the figure of 24.5 megapixels with 14 bit of depth in RAW files. That means that a single TIF image coming from a RAW shot with no compression is about... almost 150 MB, quite a lot also in our age of huge storage...
ISO range of 100-1600 and 5 frame per second.
Other features are more or less expected: 3 inch LCD with Live View, EXPEED chip image processing, wireless support, HDMI port.
Expected street price of US$7999.95 in the U.S.
An official 28 pages brochure has been posted here.