It's not that I'm obsessed with new gear, I just hate to see anyone buy gear just before new stuff comes out. Nikonrumors.com claims that there's a 99% probability of a upgrade to the D700 that will be called the D800 and will have a whopping 36MP sensor. I guess Nikon didn't get the memo that explains that megapixels don't matter any more. Price is expected to be around $4,000 USD and the announcement is suppose to be October 26 and the release November 24.
This would probably be a good time to restate what I always tell beginners in real estate photography: You are better off spending your money on a great wide angle lens than on a fancy DSLR body. When I put my real estate photography hat on, the single most important thing about full frame DSLRs (5DMKII, D700, D3 etc) is that you can get the most out of the two greatest wide angle zooms on the planet- the Nikon 14-24mm f/2.8G ED and the Canon EF 16-35mm f/2.8L II .
Probably the most frequent question I get is what lens should I use for my small sensor DLSR like D90 or Rebel XTi? My answer is always, if you have a Canon small sensor DSLR like a XTi etc, get a Canon 10-22mm if you can afford it otherwise go with the Sigma 10-20mm. Sigma makes a 10-20mm for Canon, Sony, Minolta and Pentax. This is probably one of the most widely used wide-angle lenses in real estate because it is good quality for less than $500 USD.