Weta Digital, co-founded by Peter Jackson, is a digital visual effects company that worked on the flora and fauna of Pandora in the wildly popular movie Avatar.
Jordanopensource.org is reporting Ubuntu Linux is the core OS that runs on their massive 4,000 server, 40,000 CPU farm, one of the most powerful in the world. Imagine the cost savings on licensing alone.
The server farm processed 7 to 8 gigabytes of data per second, running 24 hours a day and 17.28 gigabytes per minute of storage. It is interesting to note that Ubuntu runs on 90% of it's desktop and the company uses in-house software for effects processing.