First the Brattle said they're showing A Mighty Wind tonight partly in preparation for the Mighty Wind Tour, "due to hit Boston on the 17th." Well that's news to me, so I toddled over to Google, which gave me some cached snippet from one of the Phoenix's online editions, saying the show would be at the Orpheum but was rescheduled to the 22nd. Oddly enough the live Phoenix site had nothing to say about it.
So I delved a bit more into Google and found, on some other Boston Arts site, that the show had been outright cancelled. Ticketbastard confirmed it.
Probably couldn't have afforded it anyway, said the fox, as he passed by the now-closed Grapes store.