In article ,
says...
Since you're all asleep, I figure I'll do the generous thing:
http://www.dpreview.com/news/0409/04091605nikond2x.asp

1.5x crop - whatever, follows what Nikon said they would do.
Interesting to see if they keep the noise down and what the Canon
response will be.

And they limited sensitivity to ISO 800 just for fun and not because
high noise level makes faster ISOs unusable. Right. How dumb I am to
think about noise.