I've seen that done before at conventions. It's not at all difficult to learn to make those cuttings, although the speed is something that only comes with practice and lots of trial and error (and a budget for 2x4's). It's merely a step by step cutting routine.
The blades they use are an exceptionally fine (20+ teeth per inch) 1/8" scroll work blade. They run around $50-100 for a high quality one, however it takes a powerful, modified, and well tuned saw to do that kind of intricate carving. Most people never use a bandsaw enough to lean the feel for how to tune them that well, and most people aren't going to dish out $200 in aftermarket accessories (guides, wheels, and slip blocks) to enhance the saw's performance.
Hella fun to watch those guys work though...them and the guys who can turn intricate paper thin goblets on a lathe.
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:-) Holy Crappola Batman! Incredible.