So soon...

D40X!!!

Differences compared to the D40 10 megapixel sensor Lower base sensitivity (ISO 100 vs ISO 200) Auto ISO option includes ISO 200 Faster continuous shooting (3 fps vs. 2.5 fps)* * Slower with noise reduction enabled

http://www.dpreview.com/articles/nikond40x/
http://www.dpreview.com/reviews/compare_post.asp?method=sidebyside&cameras=nikon_d40,nikon_d40x&show=all