Battier is a very good suggestion, but I also think he'll want to sign with a contender. If the Lakers deal Artest (which wouldn't surprise me), LA would be a great landing spot. Chicago could also be interested in Battier to play the 2-spot, and that would be another good fit.
Barmes would be nice. Same with Pietrus. Both are tough defenders and can shoot the deep ball.
What about Tayshaun Prince? His best days are behind him, but he would be a good bench player and his defence is still above average.