An few eye-opening fact from this article was this:
The process of rendering the films -- or translating computer data into images -- was vastly accelerated by current technology. Where the original "Toy Story" required an hour per frame to create, Mr. Lasseter said, rendering the new 3-D version took less than 1/24th of a second per frame.
Holy plastic green men! An hour per frame? I can only imagine how long it took to render the whole movie.