The Nikon discussion forums over at DPReview.com are alive with discussions about the possibility of the D3X sightings being reality or simply fakes.
A little less arguing and perhaps a more credible source of news, on his website, Ken Rockwell reports on what could be a camouflaged Nikon D3X being tested out in the field.
On this side of Nikon's walls, all we have is speculation.