RE: cases, heat, fans...
Hi all,
I believe that the majority of heat generated by a MBP is removed via the fan exhaust (based upon my own crude experiments with various cases). If this is indeed the case (pun intended), then as long as the case does not impede airflow in or out of the MBP, the case should only minimally affect the internal temperatures. True, a case probably acts as insulation for the MBP's case, but in this case the fans just increase their speed to move more air through the MBP and thus remove more heat via the increased airflow, keeping the internal temperatures roughly the same, with or without the case. It is only when the fans are already spinning as fast they are capable of spinning and the maximum amount of air is being flushed through the MBP that insulating the MBP with a case will have much of an effect on the internal temperatures. This is because only in this case has the ability of the fans's air cooling maxed out and thus conductive cooling through the MBP's case becomes significant and adds to the exhaust airflow cooling.
...just my opinion, of course...
Switon
P.S. Sorry, I couldn't resist...
P.P.S. To significantly affect the cooling of a MBP, you should lower the temperature of the air entering. Newton's Law of Cooling tells us that the rate of heat flow across an interface depends upon the temperature difference between the heat bath and the object, thus lowering the air temperature increases the rate of heat removal proportionately. And, of course, lowering the air temperature thereby increasing the rate of heat transfer from the MBP to the exhaust air means that the MBP's fan algorithm will slow the fans (i.e., the fans won't have to work as hard to keep the MBP at roughly the same temperature).