I was thinking of making a cooling suit, it would add bulk to your body (making the suit look better)
my idea for the cooling suit would be to take a cooling system for a computer mod, with the tubes that hold coolant, and then attach them to a leotard/jumpsuit thing, so the cooling tubes are pretty much right next to the skin. and then over that, you have the padded underarmor.
I would probably wire up a switch to my wrist, and have the power supply in the "backpack" armor.
note: I'm already planning on running my suit's other electronics from the back pack as well, I think I might put a couple of "big" batteries in there (not sure what kind)