140,000 Card Replicas
Beijing Olympic Village by Brian Berg
It took him 20 days and 140,000 cards to construct this model of the Olympic Village. You have to admire the level of geek required to take this project on, and the motivation to do it in less than 20 days in front on an audience and everything.
Implications - Many wouldn't possess the patience (or the stillness) to create this delicate and monstrous model. It will really be a shame when it has to be disassembled, but I guess that's just in the cards.