There was a neato article in New Scientist about 3D microfabrication. They made reference to a lab at UC Berkeley that is working on designing 3D micro-structures using the principles used in pop-up books. I found the page of Elliot Hui, who was probably a grad student under the professor that got all the credit for the work. From the page, it looks like it was really Hui doing the research. Anyway, here's Hui's page for anyone interested.

The reason this all caught my attention was this awesome picture of a micro-scale model of UC Berkeley's Sather Tower:

The actual model is 1.8mm tall! And there are actual Roman Numerals on the clock face! So cool.