The D3 has had it's 's' update and is now available for pre-order from the usual outlets. If you are in the market for the D3s, I strongly advise not buying one for at least two months. I pre-ordered a D300s as a back-up from Calumet and was very unhappy when the price dropped drastically within a few of weeks. It's sad when you get screwed for being the kind of loyal customer that the camera manufacturers want.
The D3s has had a similar make-over to the D300s. 720p HD video is the obvious big addition, but the on line photographic community are already saying "why no 1080p?". The dedicated Live View button is a handy new feature, not just for video (see my Live View/White Balance tip here). The D3s also gets the quiet mode and Integrated Dust Reduction System. For a full list of the new features go to the Nikon site here.