Digital Home Thoughts: What Nikon Product is Hiding in the Funky Box?

The original post over on Nikon Rumors was focused on what kind of lens is on this camera body, but I think the more interesting question is what kind of camera body is under that box? If it was just about protecting the identity of a lens, some black tape would largely do the trick. There must be a new Nikon camera body under there...any guesses as to what it is? I've heard D700x and D800 bandied about lately - but where's my highly-anticipated D400 at?