Yep Eric, these are my concerns and as you say I need fast bursts. I have always suspected and probably wrongly that the D7000 is the precurser and proving ground for the D400. If that is the case then they will have to up their game for me, but perhaps an Expeed 3 processor will help. Most folks would disagree with my jaundiced view of the D7K, but as a landscape, close wildlife (minimal cropping) architectural and studio camera it's no doubt a very capable camera. In my view it isn't a bird in flight or fast wildlife camera due to high noise associated with Hi ISO's required for fast shutter speeds. The other extra with the D800 is memory, say bye bye to the current 4, 8 and perhaps even the 16Gb cards.
I am going to enjoy watching the D800/800e debate unfold, especially when users get to hold them. In a months time is the UK Focus on Imaging Show and a chance, queues permitting, to get to actually see a real D800. Personally and I am usually wrong, I feel my D400 is a long way away. I also think that Nikon have played a blinder, certainly UK wise as London 2012 will certainly give users a great playing field for both the D4 and D800 Pro's and the likes of me as well. Mind you a few may be disappointed, if they turn up as a spectator with a dSLR especially with a longer zoom fitted, they will probably have to hand it in. That happens a lot over here now!