Neil, I can sympathize with you. I primarily shoot different subjects than you and only occassionaly wildlife/ birds, sports etc. Nikon is meeting my needs. I understand much more fully how they are not meeting yours and others on this forum. I do hope they come out with a D400 or something that will meet the needs of many sports/ wildlife shooters they are leaving hanging.
"Cameras and lenses are simply tools to place our unique vision on film. Concentrate on equipment and you'll take technically good photographs. Concentrate on seeing the light's magic colors and your images will stir the soul." Jack Dykinga