I heard about the dishwasher too. While I can recommend washing with water, you must be cautious with big ol' parts like in the CRT Display (potentiometers, main switch etc).
I personally would never put any electronics into the dishwasher due to the agressive cleaning agent.
I'd also refrain from hogging the miggy into wireless lan, there's no potential way for a stock A1200 to support WPA2, at least thats what I have been told. Without a blizzard card it is too slow since the encryption is handled by the cpu for most if not all pcmcia cards.