The reason it all wasn't included from the beginning was because Cameron was unsure if people eyes and minds could stand almost three and a half hours of hardcore 3D. The first 2 times I saw it I got severe headaches after a while. The next longest 3D movie prior to Avatar was under 2 hours. James Cameron has said multiple times that they were unsure of the effect, therefore were conservative. What is this milking bull shit. It's called fucking business. If people are willing to see it more times, willing to spend the money, and are willingly doing it, I don't see whats so wrong about it. The deluxe edition is going to be jam packed with shit. Not just all three and a half hours of the movie, but probably hours upon hours of bonus features. I am honestly hoping for the movie in studio form, from beginning to end. I think that would be kind of cool to see how they made every scene.
/rant
spoilers
Now about what I saw today. The extra footage was actually pretty cool. Right when Grace, Norm, and Jake got off the helicopter the first time, they walked into a near by shack. You soon find out it was once the school, and you got to hear some cool background stuff. We got to see a hunt on a huge scale and some other cool odds and ends. The ending gave me chills this time. Tsu'tey not only passes the leadership onto Jake, but has Jake stab him to death. He gave a little speech how he will go down has a worrier, who not only fought along side Toruk Makto (last shadow), but he was also killed by him.