I'm fairly sure that Plaxus was at the 2008-03-28 show in Somerville. I saw someone who looked strikingly like him at several times during the show, and he gestured several times to the band just before they came on.
While talking momentarily about having to re-learn a song for a show in a recent interview, John Flansburgh indifferently mentions that John Linnell has a step mother. ("As John Linnell's step-mom says, 'It's not what you learned, it's how many times you've learned it.'") ~ magbatz 23:54, 16 April 2008 (UTC)