Just came across an article in the weekly Ubuntu News Letter on the processing of digital stuff in AVATAR the movie - a mob in New Zealand did it with UBUNTU.
"The computing core - 34 racks, each with four chassis of 32 machines each - adds up to some 40,000 processors and 104 terabytes of RAM. The blades read and write against 3 petabytes of fast fiber channel disk network area storage from BluArc and NetApp."
Also has more info if you are interested:
http://www.information-management.com/newsletters/avatar_data_processing-10016774-1.html
http://blog.dustinkirkland.com/2010/01/39000-core-ubuntu-cluster-renders.html
Inside NASA's world-class supercomputer center (photos)
http://content.zdnet.com/2346-9595_22-417226-1.html?tag=content;col1