I am somewhat worried about the Steelers, because they will be down both Mendenhall and Clark, but just look at Tebow's stats from this past week. Pittsburgh will most certainly put a spy on Tebow to contain him on the ground, and they still are one of the best at stopping the run. If the Broncos can't get McGahee going, it will be a long day for them.
I also don't think people realize how good the Steelers have become at passing the football. Mendenhall is a huge loss, don't get me wrong, but this is no longer a team that can't stretch the field like in years past.