Since the D7000 and D600 do not have the af-on button do you think the D400 will have it? I started using it 6 months ago and finally got the hang of it and I'd hate to give it up. Another feature I'm interested in is the fps rate. Do you think it'll be reduced to 5.5fps like the D600? I'm a occasional sports shooter and occasionally photograph birds and the 8fps comes in handy for that application and I'd hate to see a reduction.