The TrendyDigital WaterGuard waterproof case for the Apple iPad is the only iPad case that will let you control your tablet with your tongue or any other wet appendix. Which is kind of useless, since there are no smut apps.
Fortunately, it has other uses. It will also allow you to use the iPad at the beach or in the bathtub or near the swimming pool or on the bed without any fear of getting ruined by water or any bodily fluids. [Amazon]