Nikon D400?

I've recently been researching DSLR's and have been leaning toward the nikon d90 but during my research today I discovered a rumor that has been circling around the digital photography world; apparently nikon will soon be releasing an upgrade from the D300. If you want to look at some of the suspected specs check out this website:

 http://www.photographybay.com/2008/12/11/rumor-nikon-d400-at-148-megapixels/  

If anyone has any input on this or anything related to DSLR's please post a comment I'm trying to find out as much as possible.

Peace & Love.