The "true" Blu-Ray version will not be out until the November 2010 - it will have the special features that Blu-Rays are all supposed to have

Then sometime next year the 3D version will come out.
The versions available now have no special features - none!
"As it turns out, Fox has craftily decided to milk "Avatar" for every possibly penny, since the debut DVD/blu-ray will be a bare-bones release -- and it will be one of the first major films to appear in home video without any of the regular special features, such as theatrical trailers, deleted scenes and behind-the-scenes footage. "