It’s more preseason action at the Metrodome this weekend as the Vikings host the Pittsburgh Steelers.  The quarterback question is still up in the air after Tarvaris Jackson suffered a sprained MCL in his right knee.  Coach Brad Childress says Jackson is making progress.  As for other injuries, tight end Garret Mills, defensive end Brian Robison and offensive lineman Drew Radovich are all likely out for tomorrow’s matchup.  Offensive lineman Tim Mattran, offensive tackle Marcus Johnson and wide receiver Bernard Berrian are all expected to play.  Wide receiver Sidney Rice remains out with what the team is calling a virus.  Kickoff at the Dome tomorrow night is at 7:00.