Well I'm not to sure how well this works but if someone has tried it or others similar please let us know! I found this at Amazon while looking for something weather proof.
DiCAPac is the trusted, reliable and affordable case that will convert your camera in to a waterproof and weatherproof camera in no time. No matter how messy the situation is, this JIS IPX8 approved case will protect your camera against water, sand, and dust while also allowing you to take crystal clear pictures underwater. The patented "Roll & Velcro" zipper closure system provides two levels of protection to keep your case completely watertight, while the clear panels and flexible material allows you to maintain complete control over all your camera's functions. It even floats when you drop it in water! This DiCAPac case is specially engineered to fit most popular SLR & DSLR cameras.