As soon as Lifeproof comes out with a case for the iPad Mini, I wanna run one:
their cases are very rugged and waterproof to 2 meters. I have one on my wife's ipad and it really does work well. I figure the 4G/LTE iPad mini would make the perfect internet enabled GPS, only problem is you'd have to disconnect the charging cable when it may get wet to keep it waterproof.
I may get a lifeproof case for my iPhone and fabricate a mount for my it to tide me over in the mean time.