Nikon has now officially revealed the compact, professional, twelve megapixel, full-frame (FX format) Nikon D700. From the outside the D700 is virtually identical to the D300, albeit for its larger 'full frame' viewfinder, internally it's almost identical to the D3, except for a slightly slower shutter (five frames per second up to eight frames per second with the MB-D10 battery grip). DPreview have just posted their review of the new D700 DSLR here.
"In conclusion the Nikon D700 is an excellent camera that is extremely versatile and performs well both in the studio and on location. No doubt it sets a benchmark in the 'compact' pro bracket of the market. For how long remains to be seen. We will know more after we've reviewed the Canon 5D Mark II and the Sony DSLR-A900."