I do a lot of heavy number-crunching stuff like evolutionary computation, N-body problems, etc. I'm aware that the Air is a bit slower than the other laptops, but this isn't a show-stopper as I have another bigger desktop beast to run things on when I really really care. I also know that doing this while on battery won't get you very far, but that's true of any laptop. I only run such things for any length of time with the power connected. But the thing that's giving me pause is the reports of heat problems and cores shutting down with heavy CPU use. Could the Air even handle something like running genetic programming for 8 hours? For instance, what if I were to max out both cores for 12 hours with the power connected and in a normal temperature room? Would it melt into a puddle of molten aluminum and chip parts, or would it actually handle it without core shutdowns or other nastiness? Obviously the fan would whirr and it would get hot, but that's to be expected. But would it survive to complete the job, or would it collapse into a pathetic pile of single-core overheatedness? Could some brave souls out there with the Air actually do this and report the results? Run two concurrent movie encoders for a long time or some other CPU-bashing task and see what happens? I'm sure lots of readers would love to know.