There's also an option for automatic wake-up. The PowerBook can be set so that it wakes up automatically at a specified time. This can either be used so that you wake up with a ready-to-go PowerBook or if you're receiving a fax from the other end of the world with your PowerBook (while you're asleep).
There's an easter egg hidden in this control panel, although it pales in comparison to that found in the PowerBook Setup control panel. Option-click the version number.