^From my understanding the GPUs themselves weren't bad, but rather the boards they were put in... since they crack under temperature changes (room temp - 80c, back down to idle temps). Which explains why the laptop GPUs are failing at a higher rate (laptop GPUs would be exposed to more extreme temperature changes more often.)
Moving forward, I would highly doubt Nvida would make the same mistake anytime soon... so, this can only be a good thing for Apple. The Intel GMA X3100 that's in a lot of the base Macbooks is a pretty weak GPU, so it'll be interesting to see what kind of performance boost we see with the switch to Nvidia 9400 GPUs. Hopefully, we'll see the Macbook Pros take advantage of the Hybrid GPU technology as well, for a nice boost to battery life when discrete graphics aren't needed.
I'm still a bit disappointed we won't see high end ATI GPUs in Apple computers (which I anticipate won't happen due to a partnership with Nvidia). But, ATI hasn't had a competitive high end laptop part for years anyway...