I know that last year Joe Gibbs threw out a challenge flag when the opposing team had twelve men on the field and the other team was penalized. So, penalties can be reviewed. I don't know if delay of game (or lack of) calls can be reviewed, though.
Actually, what irks me are coaches that jump ship before the bowl game. Because you wind up with two uncomfortable scenarios: 1. Head Coach leaves, assistant coaches his first game in a bowl game on national television. 2.