As a Falcons fan (unfortunately), I'm pretty flabbergasted and disappointed by this move. As GAVol points, out there hadn't even been a whiff of this hiring, and every indication was that Blank was going to do the reasonable thing and bring in an NFL assistant. There's nothing on Petrino's resume to make me think he'll be particularly successful in the NFL. He must have convinced Blank that he's got plenty of ideas about what to do about The Great Vick Experiment. Meanwhile Schaub will presumably go elsewhere and start, potentially turning into Brett Favre Redux.
Bah. Same old freaking Falcons, I guess, Blank or not.