Unfortunately you may have a nice expensive looking brick... Sorry.
Cell phone boards aren't designed to completely resist water, they have very little water sealing but they don't have much air in them so the rice bag trick can work, sometimes. Camera's on the other hand are made to be very exposed inside, once water gets into the main case the ultra high capacity circuitry usually dies a slow and painful death. Card read errors, lens read errors are typically the first sign but most likely once you get those errors it's too late. It's a painful experience, my D70s went out like that, I was even using a rain bag but from taking my hands in and out it was enough to build up humidity and short out the non-sealed system.
You can try the rice bag trick but brace yourself for the worst, sorry.
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