Oh, and I can recommend a series of waterproof bags for electronic equipment, including digital cameras of the snapshot and DSLR variety, that were affordable and helped me a great deal on my trip to the Bahamas. The DSLR bag is a little cumbersome to use, but so worth it to protect my electronics and expensive lenses from sand, salt, and splashing water even when I'm not planning to submerge the camera.

It allowed me to take my DSLR down to play with dolphins and not freak out when a dolphin splashed me :-D