I received those pictures two days ago and decided not post them online because I did not see any convincing evidence that the pictured camera is a Nikon D3xs - it could be any of the D3-D3x-D3s line with black tape over the logo and model. The story goes, that this person was testing some kind of a lens and when he noticed that he was photographed, he became nervous, turned around (see picture) and immediately changed the lens - see the full story @ photofan (computer translated).
So, why is this online? First to get your attention away from the Nikon D4x concept. This news is now hitting the wires and I have to cover it since it is Nikon rumors related, otherwise I will get dozens of emails about it. Also, take a look at those pictures, maybe you will see something unusual (I couldn't). I know that there was a Nikon D2xs, but what is the D3xs suppose to be (if true)? A 24MP with very high ISO? The D3x will be 2 years old this year and since it appears that there will be no D4 in 2010, we may get another D3 refresh around December (this is an opinion/speculation, not a rumor).