Yes, he has. I'm not sure if he's returned to New Orleans yet, or if he will, but the last I heard he was taken to Houston by the National Guard.
Haven't heard the record yet. I've heard some mixed reviews so I'm not sure if I'll ever pick it up. Frankly, I would have preferred it if they'd labelled it a Big Star/Posies record or something, but that's really probably just me being stupidly unwilling to accept that Jon Auer and Ken Stringfellow are actually part of Big Star now.