FWIW Many years ago a friend of mine dropped my digital camera into the ocean, when I handed it to her to hold while I exited a kayak. (She replaced the camera and the card inside). The card inside, a 256MB CF card, continued to work for almost 2 years after that. I never trusted it and only used it for things I didn't care about, expecting it to die at any moment... but it held out for longer than expected. And that was with salt water...