$1600 is a good price, but not yet an unmissable bargain, is it? The price definitely has room to fall farther, depending on what Nikon release in the next few months.
Consider that the full-frame Canon 5D often sells for around 800 euros in Paris. The D700 is more capable, of course, but it's not "twice" as capable (a lightly-used D700 can fetch 1600 euros in Paris, though I've seen legitimate sales as low as 1350 euros — albeit for grubby bodies with over 60,000 shutter activations).
I'm still tempted to buy a D700 and ignore any successor, whether it arrives sooner or later, until its price falls 20% when the early adopters have had their fill (may take many months with the pent-up demand). And if I really like the D700, just ignore the successor entirely.
But my urge to get the D700 is tempered by the sobering prices that the D300 and D300S sell for today, post-D7000. E.g:
750 euros (scroll down)
625 euros (50,000 clicks, but still…)
650 euros (42,000 clicks)
900 euros (just 2,800 clicks, with MB-D10 and two batteries)
I paid 1300 euros for a new D300S a year ago…
I've got some fine photographs from it, and it's a joy to use, but the sensor ultimately disappoints.