I am posting this right now from my dried out Treo 650! I let it dry for just about a week. Then Amy put the battery in while I was still away. It worked!!
Well, mostly. There are a couple of drying spots visible on the inside of the screen. But not bad. Worse, if you are on the phone you can barely hear the other person unless you use speakerphone or a headset. But I usually use a headset now anyway.
So all is good! The Treo yet lives!!
The story of how the Treo sawm in the first place, is of course here.
Oh, by the way, it eventually fully recovered, even the speakers. So I could use it with or without a headset.
Uh, at least until it tried to swim again.