The Bengals have hammered me all season; they're hopelessly inconsistent and trying to guess which team will turn up on any given gameday is a nightmare, however, I'll give it a whirl.
I'm going to rely on the Bengals' weakness against the run, their poor front and Carson Palmer's deterioration in this one; this once useful passer has lost his arm and Cincy will find it difficult to establish an effective offense with a running game that is also struggling and facing a powerful and aggressive Pittsburgh defense. The Steelers are rated first against the run and, coupled with a shaky Bengals offensive line, Benson is unlikely to get it going. Wideout, TO has been putting up the numbers (as Ochocinco has slowly sunk out of sight) but as I say, Palmer no longer has the zip or accuracy to get the ball deep with any confidence.
On the other side of the ball for Pittsburgh, look for Mendenhall to have a solid game. Cincinnati are poor against the run and are badly banged up with Tank Johnson out and Frostee Rucker and Keith Rivers limited. This will relieve what little pressure Roethlisberger will feel (and that won't be much, the Bengals have no pass rush to speak of) as the Steelers will establish the run early and air it out as the game goes on.
One caveat; this is Monday Night Football, when the home team always seems to raise their game, so don't go crazy.
Nonetheless, I expect Pittsburgh to cover.
Pick: Pittsburgh -6 (3pts)
Pick: 1st TD Mendenhall (0.5pt)
Pick: Anytime TD Mike Wallace (1pt)