I'm getting quite a few more comments here than when I started, which is lovely! To keep the conversation lively and civil, I've put together a comment policy, which you can find on the blog's About page. (I'll link to it from the sidebar momentarily.)
It's mostly common sense. Moreover, I haven't had to edit or delete a non-spam comment here yet.
Still, I'd rather have a policy and not need it than need it and not have it. So now it's there.