So you're saying cooler is better. No argument here. But your'e ignoring the fact that the Hatter gave:
Intel warrants Xeon for running 24/7 at more than your 60-70*C. And it is Intel that designed the processor and cooling.
The anomaly isn't that computers run hot and that shortens their lives, as it does any mechanical device. It's that apps you would think cause little extra heat at all, create quite a bit.
I'd like to see that fixed too. But I don't know where the fault lies, it seems Nehalem is the cause from one angle, and Apples OS from another. Marcel Bresink, I think, did an excellent job of pinning it on the OS, but he didn't know then that it was only happening on Nehalems. That it happens only on Nehalems, would pin it on Intel.
Well, this is where the threads on this usually end, exasperation. We simply don't have enough info and we don't know if it's being looked into at all. But we do know that Nehalems are new and being worked on to make them run better as we write. I'd say if in another six months we don't see this addressed, or the next gen MPs don't have the issue, then that's the time to get hopping mad. As it is, you are pretty far out of the range of this causing any lasting damage.