Well, we saw it today.
I liked it just fine. I don't know why people are complaining about the story. You can pretty much tell from the previews that it's going to be a Battle For Terra/Dances With Wolves type of thing, and besides, what the hell do people expect from Cameron? Deathless dialog and surprising plot twists? Ain't gonna happen. It looked good, it was entertaining, the flora and fauna of Pandora was fascinating, it didn't bore me. A good time.
Although one of my kids said it was too long... And they both want to see it again in 2-D. One of them said the 3-D was unnecessary and he perceived a slight flicker for the first 20 minutes or so. (This didn't happen to me, thank God.) So we'll probably be seeing it again sometime.