Not sure where you're getting your pricing information from Maui. The D4 already has a confirmed debut price of $6000 US and $6300 CAD.
The D800 is "rumoured" to be $3000 w/ AA and $3900 w/o AA. Which I think is too much. But in light of the damage done by the quake in Japan and flooding in Thailand...some of this added cost might be to recover some cost to rebuild. Nikon just got some insurance money. I think it was around 7 million (1st payment) but there is supposedly around 143 million dollars worth of damage.
Not sure if Canon headquarters or their factory took much damage. The cost of the 1D-X seems more or less "fair" for a flagship model. Though $2799.99 for the 5D3 is a slight increase over what I believe the debut price of the 5D2 was by a few hundred dollars. I was hoping for $2500 or less. But paying around $2800 is a lot better than paying Nikon prices for their D800 models IMHO.
Again, all I'm hoping for with the 5D3 is the specs recently listed here at CR + the native ISO of the 1D-X 100-51,200 (max 204,800). And I'll be putting in my order.