http://boxofficemojo.com/movies/?id=avatar.htm
Avatars opening is the highest ever for a new property I believe. And with the good reviews and presumably good word of mouth plus the fact its skewing heavily towards 3d cinemas, it should have great legs aswell.
Plus the film also has Italy, Poland, China, Uruguay and Japan still to open in.
Its looking like the most expensive movie ever made might actually make a profit afterall.