Bruce would pay dividends beyond his ability to catch the ball. He'd teach the young ones what it's like to work to be great. I say sign him, unless he's looking for a ridiculous deal.
I think that's where is real value comes in. He's still a good WR, but I think the intangibles he'd bring to the team would far outweigh what he'd produce on the field. That said, I think I agree with the others that he may retire.