Nikon has announced a new 50mm/f1.4 AF-S lens, their first prime lens with an internal auto focus motor. Unlike their current prime lenses, including the popular 50mm/f1.8 AF, this new lens will support auto focus on the D40, D40x, and D60. One of my reasons for upgrading to a D90 was the D40x’s lack of internal auto focus.
The new lens will be available in December for $439 in the US.