Some interesting facts on this link

[AH_Viper]

Worth a read, some of its quite interesting...

Its about the supercomputer Weta use:

"Some of that data is a few years old because some sequences, such as the Balrog from the Mines of Moria, appeared in more than one film.

Finding and moving the data for that sequence out of storage so it could be reworked for the second film took about three days."

http://news.bbc.co.uk/1/hi/technology/3672887.stm

 

[Jackal hit]

The battle pitted 120,000 digital orcs, each with its own AI fighting style and armour against 8,000 digital Riders of Rohan.

that's freakin insane

 

[Death.Trap]

I wanna get my hands on their version of masive =D