Trolling MacOSXHints, I found this idiotic hack to cool off an iPod during a mega-sync session.
I have a 20 GB iPod that's on its last legs. Whenever it syncs a lot of songs [it gets] super-hot. So I borrowed an idea from overclockers...took a cold pack that was in the fridge, wrapped it in a towel to absorb condensation..worked like a charm.
Bad bad bad bad bad idea. The towel will mop up the condensation on the ice pack. But if the iPod gets cool enough, condensation is going to form inside of the case itself. Not good.
Cooling an overheating iPod [MacOSXHints]