We know that these things are never really off - just paused & muted, so the "OFF" screen is a bit of a misnomer, anyway.

When I hit "off", is there a new window that gets automatically thrown over the screensaver, and intercepting all input? I was playing around with adding some interactivity to a screensaver, and noticed that it worked when in NowPlaying, but not when "off". I assume that a new window is thrown up, with just the "power" button as the only available icon.

1. Is this configurable? If so, what applet controls the power functions?
2. Is there a way to disable the OFF button (not that I want to, just curious)

What's the best place to learn about all the different input methods & constants used?