This just in from Benjamin:

Here in West Des Moines, Iowa it went like clockwork, just like every
other time. I walked in, filled out a little piece of carbon paper
stating who I was and signed it, walked to the next person who checked
the paper against her big book o' people, and then to the next for a
ballot. After receiving my nice paper ballot I completed the arrow
pointing at the candidates I was voting for, checked it over a couple
times, and stuck it in the machine. According to the LEDs on the
machine, I was number 812 for my precinct.