Here's an idea for picking up Mike Wallace. Trade down from the 13 spot say three times down to pick 32. Get us a #2 and a couple of number 3's and then sign Wallace. Giving Pittsburgh the #32 pick for the top wideout in free agency. We get Wallace and three high draft picks.
I'm pretty sure that when a team acquires a player with required draft pick compensation, the pick must be the acquiring team's original pick.
...dave