I'm sorry for such harsh posts, my annoyance threshold just isn't what it used to be. It's just astonishing that the (I believe) vocal minority keep beating this horse to death (there's another thread on the screen topic), just for the sake of complaining. We all clamored for a non-1 series camera with better than the 9 point diamond AF, and what Canon delivered (admittedly on paper) is pretty amazing if it lives up to billing (RG notwithstanding). When you need a smaller AF point for small birds in trees, it's there. When you need a larger high precision AF point for really lowlight AF, it's there - all over the frame. Need expansion for tracking moving targets - you got it.
This camera was designed for high speed, high quality AF. I hope it lives up to it's potential, because if it does this is a landmark camera for Canon. The fact that it is an APS-C doesn't bother me, because I always intend to own more than 1 body. I also realize that there is now a very good chance that a FF camera with the same features might actually appear within the next year. I am also realistic enough to realize that if it does, it will NOT have a faster than 5fps frame rate.
I was right at the edge of putting all my canon gear up for sale and switching to nikon when the d700 came out, mainly because it didn't appear canon was very interested in keeping my business. The 5d2 has great image quality, but seemed very outclassed in every other respect. That appears to be changing now. From my perspective, the only thing that the d300s has that I would want is more tightly spaced AF points - but we'll see how tracking works in the 7d. I expect that the next FF camera from Canon will keep many of the 7d's enhancements