From the One Damn Glitch After Another Department:
I’ve had reports the past two days that folks haven’t been able to sign up for the daily email version of the Millstone. After some digging around I see there’s an issue with the ‘MailChimp API’ that doesn’t look especially easy to sort out.
In the meantime please send sign-up requests to email@example.com and I’ll add you to the list manually.
UPDATE: I seem to have this working again. Let me know if you have any further problems.