I recently experienced the same issue after getting caught in the rain. A few droplets must have entered the casing, because soon my power button started acting up. At first, it would work intermittently. Sometimes I would even see the phone screen flashing on and off, as if the power button was continuously short-circuiting. Eventually it stopped working altogether. This wasn't much of an issue because I could turn on the screen by pressing the Home button, and turn it off using a widget I downloaded and placed on my home screen. But like an idiot, last week I shut down the phone for whatever reason. Now I can't turn it back on... because the power button doesn't work. Stupid. I opened up the phone and as soon as I touched the power button (the part that actually goes click-click), it literally fell off of the ribbon. I guess the connections must have rusted through. I have ordered a replacement part. Fingers crossed.
