I'm adding a link to
Ken Rockwell's D3 review DETAILED LINKS AT BOTTOM OF THAT PAGE. Whatever his faults, the guy has clearly used and abused his D3, and the ergonomics of the D3 carry over to the D3x. This may not be of much use to seasoned Nikon shooters, but people who have come over from Canon will get an adaptation boost here. Newbies will find pointers to setting focus (Hint: The big white square actually works), Dlighting, and Auto-ISO.
My D3x is proving more of a challenge to set up than the Canon bodies I used before, because the Canons just needed setting up to single-point focus, with all the Jpeg look stuff irrelevant, while the Nikon looks able to supply some remarkably good in-camera conversions so I'm slowly setting up the Jpeg options. Of course anyone who does sports will want to spend some quality time with the manual and the AF customization controls, but that's a specialty undertaking anyway.
So far, my description of the D3x is still "Just works".
Edmund