I bought a 7D a couple months ago and have been using it in place of a 40D for my every day shooting needs. I've been reading about the auto focus but really haven't had a need to use the expanded center point focus with AI Servo.
Well this weekend I went out to Jasper Pulaski Wildlife Refuge in north central Indiana to shoot BIF and holy smokes!!! It was a joy to watch those focus points dance around as it kept track of my subject. I had so many keepers I was giddy. Here is one example that I just posted in the Bird section.







