One thing that makes me wonder though - who is the target market? Seems like there is no market for the D700 at all! at this price, I think most sensible people will either go for the D3, or the D300. Not something inbetween.
Unless of course, you tell me that the D3 is going to go out of production as soon as the D700 comes out together with the D3x :think:
You have to give it to the Marketing Dept in Japan and Internationally. They will not produce something without any market research and with no market demand.
By the end of this year the market will have more choice from Nikon in this segment ie. the Pro and Prosumer DSLR segment, which was very limited in the past as compared to Canon.
This will be the line up by end this year (for Prosumer and Pro DSLR)
D3X (assuming the nomclature is as that

D3
D700
D300
You will not see the end of production for D3 at all as it still has a place in this segment for awhile.
The rumoured D3X 24mp will aimed at the 1DS Mk3 market.
The D3 will be for the outdoor, sports and Journalist market (very much the same as the D1H and D2H type of market except pack more punch in mp, resolving power than the H series ie FF etc.)
The D700 is aimed at the 5D market ie. mainly the wedding photojournalist and serious hobbyist or "prosumer" who do not want to pay the price some of the features of a D3 but yet having FF and D3 type of sensor.
The D300 for the prosumer who feel there is no need for FF to produce great images.
D700 was quite a well kept secret(in terms of the nomenclature ie D700 not D300X or D400) until the leak.
Well lets hope that the Prizes for this http://www.clubsnap.com/forums/showpost.php?p=4104066&postcount=1 (see serial no "I" ) can be "up sized" to D700 ;p :bsmilie:
Disclaimer: Just pure speculations and my own views. Nothing to being a Mod in this section etc etc etc :angel: