Congrats Paul!
I am toying with getting the camera simply for the increased ISO capability and agile focus in dim light. For this alone, I'd be so much on a high with my Canon 50 1.2L and would have my near perfect system for relaxed street and portrait photography.
I am hesitant to buy this now since I believe that we are on the edge of many new options. If I was forced to buy a new camera, I'd get the 1DII N if I was to be a sports photographer. No doubt, Canon will eventually address any issues. First they have to accept the reality of faults in their perfect new camera! Then they have to find solutions and still saving face!
If I didn't have a digital camera and just did the relatively stationary subjects I do, I'd love the 1DIII. If it works well on the catwalk or in clubs, then I'd definately get one.
I hope you will share with is your experience with this great new camera.
Asher