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.
AFC 1. New England 9-3 East leader (7-2 AFC, 0.421 SoV) Will win the div with a win and Jets loss 2. Baltimore 9-3 North leader (6-2 AFC, beat Houston, swept Pittsburgh) 3. Houston 9-3 South leader (7-2 AFC, 0.387 SoV, lost to Baltimore)