Take the battery and SIM out! The water may harm the lcd display, but the electronic components and pcb will be just fine. We wash all our boards in water to get rid of the solder flux residues. It's fairly standard for boards that have to look nice. As for drying it, rice helps, but if you put it in a tray of rice inside a fan oven with the dial at 45C, things speed up. Twelve hours should do it. You may need a new battery.
Well, at least you tried! Good luck.
BTW, don't forget to take it out of the oven. My mp3 player was subsequently roasted with a chicken.