An election is a big process for the community (and for SE team to set up), and now that Qiaochu's resignation will set one in motion, I am going to take the opportunity to resign as well.
To be clear: I don't have any specific complaint, I'm not making a principled stand for or against something, I'm not in trouble with the SE people, and I'm not leaving out of disagreement or exasperation with any user or fellow moderator. I've just put enough of my own time and effort into it at this point, and I'd like to focus on doing well in grad school. There are plenty of other people who will do a good job as a moderator.
I do plan to continue participating as a normal user.