Saw this posted on LI by ss11:
http://linuxinternationals.org/phpBB3/viewtopic.php?f=34&t=3083... The lead visual effects company was Weta Digital in Wellington, New Zealand, at one point employing 900 people to work on the film. To render Avatar, Weta used a 10,000 sq ft (930 m2) server farm making use of 4,000 Hewlett-Packard servers with 35,000 processor cores. The render farm occupies the 193rd to 197th spots in the TOP500 list of the world's most powerful supercomputers. Creating the Na'vi characters and the virtual world of Pandora required over a petabyte of digital storage, and each minute of the final footage for Avatar occupies 17.28 gigabytes of storage. To help finish preparing the special effects sequences on time, a number of other companies were brought on board, including Industrial Light & Magic...
http://en.wikipedia.org/wiki/Avatar_%282009_film%29#Visual_effects