Found some stuff about Pixar:
"Siggraph: Pixar animation software to get boost on Windows supercomputers
August 13, 2008 (Computerworld) The rendering software behind such hit animated movies as The Incredibles, Ratatouille and Monsters Inc. should become even more powerful when it becomes available on Microsoft Corp.'s most advanced operating systems later this year.
"Let's put it this way, your graphics pros, your render wranglers, they just got their headroom doubled," Needham wrote.
According to Microsoft, HPC Server 2008 can support systems that scale to thousands of processor cores, and it includes faster networking capabilities and more powerful cluster management tools than prior versions offered."
http://www.computerworld.com/action/art ... Id=9112545
We can be pretty sure this will be used in future movies, but is there still time to use it on Up? The release is still months away, and i guess there is still much to be done.
More computer power means better images, and hopefully a better looking human skin, which really needs improvements in my opinion.
Disney's supercomputer ranks as number 488 in the world, but what it is for Pixar, I can't say.