David, it was your comments on file size for travel shots that started me playing with the crop in the D3S and lead to my decision to buy the D800.
I'm with you on 1200-1500 shots for a soccer match and if it is a tournament with a morning match and one in the late afternoon....
I also found that you can see the action outside the crop in the VF. I've used it mainly for long range birds so far, where I am going to crop big time anyway, and if I want the bird with something specific in the background I can watch the bird coming into the crop frame.
I will not have the D800 until next week , if all goes well and the cameras are not in the questionable AF batch , so will program the Fn button for area ? I have very bad habit of forgetting to change settings in the heat of battle but at least this change will be very obvious in the VF