I'd take him. He's 27, and was a monster with the Vikings. I don't know if he's a 3-4 DE or if we'd have to convert him to a OLB though, which is always tough.
I know he was a 4-3 DE in Minnesota, playing on that talented line with the two Williams inside, and Jared Allen at the other end.
I would assume he played same position in Atlanta since they run a 4-3 as well with Abe opposite him.
He is still young. I don't know why he didn't produce in ATL though.....its not like he was the only pass rusher since Abe was opposite him. Might be worth it to take a flyer on him for the rest of the year and see if he can adjust to playing OLB in a 3-4........worst case he is ineffective and is a FA at end of year.