I'm also very much in that bracket that's awaiting a D300/s replacement.
As a bird/wildlife photographer I need decent FPS and the extra reach the DX body offers is important. I use a D300 at the moment and was really hoping that the awaited announcement was going to be what I have been waiting for. I was really disappointed to see another FX body. I honestly thought "what...seriously? haven't they just gone overkill on the FX market?"
It's been said above but there are alot of people waiting for this gap in the market to be plugged, there just has to be something on the way that offers decent FPS, better noise handling, 18-24 MP bracket without losing any features that the D300/s has.
I guess my money will just be burning a hole in my pocket for longer then...