Ross Technology Corp. has developed an amazing silicon-based spray-on coating called NeverWet that can make almost anything completely waterproof. An iPhone sprayed with NeverWet still functions perfectly after being submerged underwater for half an hour. Spraying the coating on clothes causes liquids (e.g. water, oil, chocolate syrup) to slide right off.
NeverWet won’t hit store shelves until next year, but imagine what it could do for photographers — you could cover all of your gear with a coating of the stuff and not have to worry about it when shooting outdoors!