I was lucky to get a D800 from BestBuy today. Check your local store - they may have some in stock. My Amazon order is still in a "not yet shipped" state (pre-ordered at 1:07 am the night of the announcement). Some readers already received shipping dates from Amazon. Many small dealers in the US got D800 shipments today, but the majority of the orders were sent to NPS members. I have not heard anyone (non-NPS) getting a camera from one of the major US online retailers.
Today Apple released Digital Raw Compatibility update 3.11 that includes support for the Nikon D800:
Keep in mind that Nikon will suspend all shipments next week for their yearly inventory count.
I will probably not be able to answer all the emails I received in the past few days. Thank you all for the detailed updates from all over the world. I will be playing with the D800 in the next few days and will probably be offline.