Since there is still a distinct possibility that the Steelers could draft Adam Carriker (although many on this site don't want to hear that). Would be interesting to see what kinda damage Brett Keisel could do from the OLB position. He says he likes playing LB and he is a big strong horse with a motor that don't stop. And Carriker is also a beast! All of these questions will be answered soon enough. After the draft is over we will have a good idea of the possible line-up variations that Tomlin will have to play with.
This is a very good point about Keisel. I think he is a perfect hybrid player. A guy that could play both 4-3 and 3-4 with no problem. I wouldn't question his coverage ability from the OLB spot. But I sure would love to see him rush the QB from the OLB spot.