Well, it seems more people are having problems with their Wiiconnect24 on then people that arent having problems. So heres a small solution.
Maybe Nintendo could update the Wii's with a firmware update? to give an option for the Wii's to have fan on/off during Wiiconnect24 Standby?
I dunno, is this possible? cause it probably be worth it. Even if the fans werent on full power, but just enough to keep the Network cards cooler.