Haven't seen much of him this year either, but assuming he hasn't fallen off sharply, he's the archetype of the role player good teams want: spaces the floor, plays defense, has a good attitude. Not a great offensive player, but good teams will already have top-notch shot creators. You know Rondo could find him for those corner 3's, for example.
Any contender should take a hard look at acquiring him, but the C's don't have a lot of trade assets. I'm actually kind of surprised that he didn't get snapped up in the last year and a half as the Rockets went with their youth movement.