Why a teapot? Because it has become the standard model for showing off computer rendering techniques.
The line to get the teapots was ridiculous this year. They give out a batch each of the 3 exhibit days. I stood in line on the first day and they ran out by the time I got close.
The next day, I got in line over an hour early, and I was still several blocks from the start of the line. I did get one, though.
Based on the certificate of authenticity, they give out 1,500/day.
Here is a nice video clip showing how long the line was.