The Mill has posted a great podcast showing the work that went into the amazing Caterpillar commercial. It shows the original storyboards, previs, reference photography, and various stages of the rendering and compositing work.
Randall Hand
Randall Hand is a computer graphics programmer and news junky that's been working in the field for the last 15 years. He's responsible for visualizations generated on some of the most powerful supercomputers in the world, ytnef, mullion support in ParaView, and VizWorld.com.