This is according to Fotosidan:
“On Foto2008 fair, so we talked with Lasse “Nikon-lasse” Pettersson at Nikon English and he can confirm that there is no press viewing the 20th of November.”
Update:
At the same time someone at dpreview claims to have seen the D3x with a release date of December 1st:
“Hold your breath, it will have a very interesting spec which – now – makes it clear to me why they put on hold the D3 production.”
Here is another thread on the same topic.
I still believe we will see the D3x in the next 2 weeks.