Well, since they've already replaced the logic board twice, this would be the 3rd time. If it is the culprit, I'm going to
push for a new 13".
-The Tuck
Please do. AppleCare is excellent, especially if you know what you're doing. My friend is a complete genius when it comes to maneuvering AppleCare. He had a third-party eSata device for his MBP 17". It turns out it was, over time, shocking his computer, so that his computer ran slowly and not at all on the 9600m. He kept taking it into Apple, they thought it was the hard drive, so they replaced it (he also got to keep the old, perfectly good one for free, because he complained about 'sensitive data'). After two more times of this, they finally just gave him a whole new MBP, upgrading both the processor to 3.06 and the ram to 8GB (!) because of the hassle. That part seemed a little too evil to me, but the point is they will make sure you're happy.