Young defenses always need a vet presence when things eventually get tough come November and December. He may not contribute much on the field besides rotational depth, but could have a good impact in the locker room.
If the price is right and he's a good locker room guy, I say do it. He does have a SuperBowl ring, which I don't think anyone on our roster has.
We definitely have more talent on offense besides the QB position.
If Cam had this kind of talent around him in his prime... just imagine... he carried the offense to #1 in the NFL with the likes of Ted Ginn and Philly Brown.