Dreams behind 'Avatar'

In a new featurette, Director James Cameron explains some of his dreams that inspired him to finally bring the film, Avatar, to life.  After waitng years for technology to catch up to Cameron's creation, he has dusted off the script and put in $250 million into his project.  The featurette includes some great images and insight into the creation of Avatar.  I want this movie to do well, but it's so obscure and full of blue aliens that I just need more of these featurettes to understand it!