oh lord, when I saw that rumor, I my heart sunk.
And I know JonnyA's heart sunk too - I think he and I are probably one of many D90 owners waiting to get into FF and waiting on the D700 replacement.
I think this would be a good sign though for those of us on the fence.
Could mean the D700 will remain the only FX with a 12mpx as they update the D3s->D4 and D300->D400 to larger sensors?
They could keep the 12mpx FX line going in that body, and like someone said above, introduce a D900 with the 24mpx sensor.
In the past, Nikon has sold the D200 with a 10mpx sensor alongside the D2/D2x/s variant, so potentially, the D700 could become a D200 type sensor and be used for awhile. . .(hell it found it's way into the D80/D40x/D60/D3000). . . .