I preordered the camera at Adorama. They are accepting preorders...
Not anymore, or at least, not that I can find.
You will have to call them. Currently, they only accept pre-order of 1DX over the phone, not online. Adorama set an internal pricing of 1DX at $9999. Of course this is not the price you pay. They will take a credit card authorization of a small amount (not an actual charge) to hold your place. Once the pricing of 1DX is finalized by Canon, you will be given an opportunity to either accept that price and confirm your order, or you may choose to withdraw. Adorama is very reliable based on my 4-year experience dealing with them and will never charge your card until the camera is actually shipped, so personally I see no risk at all to place a pre-order.
I will be shooting at the Olympic Trials and also in London so I will surely need this camera. I called them in early November as soon as I figured out this channel, and there were already more than 50 people ahead of me. Good luck!