One question. Do you think that heat from the MBA will dissipate slower with the shield on?
I can tell you the answer is YES, without the Invisheild, under a full load task like recoding video's the machine would get to around 53C with fan at 4800-5500 Rpm, with the IVS installed, it does act as an insulator to some degree, and the same task now puts the temp up to around 78C with the fan maxing out at 6200 Rpm. This is true even if you raise the case up in the rear as I did with a 1/2" eraser under the rear. The ambient temperature in both cases was around 69F.
I was somewhat concerned that maybe I should remove some of the IVS around the hottest part, where the processor is located, but decided against that, given that I do very little recoding with the MBA, having an iMac 2.2 24" Late 2007, for the heavy duty work, and was really just seeing if the littleboy COULD handle some heavy lifting , which it did quite nicely.