Avatar will be released next month, and if you can't wait, you can try the Avatar Air app first.
In this app, you can view all of Avatar's trailers to date, and you can track the latest news updates for the movie through the app's built-in web options. Click the Twitter button inside and you can see their latest Twitter messages. The app also provides access to Avatar's Flickr page to view screenshots and to YouTube to watch trailers.
If you've already seen all this, the app also includes interviews with the people behind the scenes to give you a deeper understanding of Avatar. The app also provides an interactive movie, and some parts of the movie can be clicked to interact.