You should do a little research before you jump to gut instinct conclusions. An N900 in water for a few days could very well survive, in fact it probably would so long as the battery was removed and the water relatively clean.

I used to routinely wash dusty motherboards, heat sinks, and video cards in an industrial dishwasher, soap and all, then I'd leave the parts in the sun for a day after rinsing. I don't recall having ever lost any hardware from this either, though more than a few machines became less buggy after removing all the crud from various ports.