Nikon's made it clear that they're still making D700's. Some are misinterpreting this to mean that a D700-like camera will stay in the lineup until it is directly replaced by something other than a D800.
I believe the reason why we're still getting new D700's is simple: the quake and flood. I'm pretty sure that Nikon ordered parts to make some fixed number of D700 units. They continue to make the camera because they haven't hit that number. The quake shut down Sendai, then caused them to redesign and change the plant, then some parts didn't come in because of the flood plus then they began early production of other new models at Sendai, which involves training and new procedures. All of which conspired to keep finished D700 models in short supply recently. But I don't think Nikon cancelled parts orders. In other words "we still have parts in stock or coming in, so we'll keep making them."
Nothing wrong with that. Indeed, it gives us more FX options these days than ever before, and the D700 is still a very competent camera. It's playing the role of entry-FX even more so than before. But a lot of people are making the leap to "there will be a direct D700 replacement, too." I'm less sure of that. There should be one, but I'm not sure there will be one. Even if there eventually is something to fill its role as entry FX, that would still be more than a year off. Nikon has three other cameras to update first, and they're all DX.
So enjoy the extra FX option while it lasts.