Nikon D40 is now semi-officially discontinued in Canada - Nikon reps sent out an email today to local stores.
Nikon D40x has been unofficially discontinued for few months now (refurbish only available from Adorama).
This opens the door for a new entry-level Nikon DSLR @ PMA. In fact those are some of the rumors floating around the Internet: a new entry-level DLSR at PMA and the D400 will come short after. One thing we know for sure that the D400 will be released before July 2009. Why - see here.
The question remains - what will be the model of the new Nikon DLSR camera: D65, D60x, D10...
Update: there is a thread on dpreview that confirms this rumor.