We finally went and saw Avatar in 3D, and I definitely recommend it. This article waxes lyrical about the coolness of the biology in the movie, and the biologist (a plant biologist no less!) who is one of the important characters. Careful though, there's a spoiler at the end of the article.
Who else has seen it? Did you like the world's biology?
(BTW, Beth, I remembered to click through Cinekin to buy tickets via Fandango :-) )