Center: Perk should be able to play solid D against Gasol, but, as usual, will be a non-factor offensively, with the possible exception of offensive rebounds he might get by out-muscleing Pau.
PF: I don't see KG's game being altered much by Odom. Odom's best bet would be to try to pull KG outside to keep him away from helping on penetration.
SF: Not sure who the Lakers will put on Pierce. I'd probably go with Kobe. He would give Pierce some trouble, but Pierce could possibly put Kobe into foul trouble if the Lakers went with this matchup. If it's Radmanovic, I think Pierce will abuse him.
SG: Not sure if the C's will put Ray Allen on Kobe ... that would worry me. They might go with Pierce. And, Kobe will get a healthy does of James Posey. The C's will also double Kobe as much as possible, and force the other guys to hit their jumpers. Cleveland did this well, and I would imagine the Lakers shooters will do the same (and likely better) ... that's my biggest matchup fear.
PG: This should be a pretty good matchup. I haven't seen DFish play in years, but he used to be a tough defender. Assuming he hasn't lost much of a step, he should do OK vs. Rondo. Rondo should be fine defending DFish.
As I mentioned above, I can see the Lakers giving the Celtics trouble in the same fashion that Cleveland did, with the supporting cast hitting the open looks that are inevitable as the C's try to take Kobe out of the game.
I also think the Lakers are better then their individual matchups would dictate ... probably due to Kobe making everyone better. So, this should be a slugfest.