Makes so much sense if they're not afraid of the Magic. The only reason a team needs Perkins is if they have to cover Dwight. This move makes guarding the Heat a whole lot better. The Celtics needed a player who they can rely on to cover LeBron/Bosh when Pierce/Garnett come out of the game.
Plus, this means they'll be able to sign Dwight come 2012...and I do believe he'll go there now with a young duo of Rondo-Green.
As I said before, I LOVE this move for both teams. The Celtics believe they can beat Orlando (who didn't get any moves to get better :lol

, and got better against the Heat while fucking over the Lakers. The Lakers have been shitty this year, and they gave their #1 threat OKC a HUGE advantage. Ibaka/Perkins will shut down Gasol/Bynum.