[pixelpoet]

I think the later development of mixed triangle/quad subdivision by Warren and Schaefer is even more elegant, besides being more general: http://faculty.cs.tamu.edu/schaefer/research/tutorial.pdf

[ihaveajob]

Ah, the Stanford bunny. It's been a decade since I last worked with it in grad school, but I can't help feeling fond for the little guy. We spent hours and hours of frustration together.