What is the function of the power button on the Apple Wireless Keyboard?
The power button only powers ON/OFF the keyboard, it doesn’t power off the computer. 

To power off your computer using the keyboard, you might want to use any of the following:

Reference:


⌘ (Command key) - On some Apple keyboards, this key also has an Apple logo ()
⌃ (Control key)
⌥ (Option key) - "Alt" may also appear on this key
⏏ (Eject) 
⇧ (Shift)


⌃ Control + ⏏ Eject : Show shutdown dialog

⌥ Option + ⌘ Command + ⏏ Eject : Put the computer to sleep

⌃ Control + ⌘ Command + ⏏ Eject : Quit all applications (after giving you a chance to save changes to open documents), then restart the computer.

⌃ Control + ⌥ Option + ⌘ Command + ⏏ Eject : Quit all applications (after giving you a chance to save changes to open documents), then shut down the computer.

⇧ Shift + ⌃ Control + ⏏ Eject : Sleep the display, but not the computer.  (thanks to VxJasonxV)