I laughed when I first heard it also but then I found out that many computer techs do it. Water doesnt hurt things like mice, keyboards, circuit cards, etc. Only letting it air-dry, or worse yet not completely dry before using it, hurts it. Dishwasher, hair dryers, anything that can dry it fast is actually a good thing. Its definetly the recommended routine for coke spills.
I only tried it the first time when I found out that replacing the keyboard would cost less than $20 so I figured I had nothing much to lose. It worked great.
Note: microwave drying is NOT recommended.
