Looking at the other options that are available to use for our 4th/5th big... would you rather have Big Ben on the bench, or Swift? How much better is Joe Smith? Ben can still board, not as well as he once did but better than most. He can still defend. He's got the bulk to match up with Shaq and he'll use his six fouls more effectively than Mikki did. 'Sheed will still be the primary backup, of course, but I can see 'Sheed spreading the court while Wallace cleans up underneath and helps out on D.
At the veteran minimum, and with no promises of playing time, I'd take Big Ben. We're going to be really shorthanded up front if we make the trade I want us to make, Scal + Tony + whoever for Nochioni.