If you managed to get your hands on an iPod Nano, you might have browsed through the menus and noticed some new features like a World Clock.

The World Clock is easy to use. Just set the clock(s) and you can see the current time in multiple locations all at once. Seemingly trivial but surprisingly helpful for someone who does a lot of international business or traveling.

Our favorite little detail was how the clock faces turn black/white when it is night/day time in a particular city (see image on right). This makes it even easier to digest multiple world time zones with a single glance.

You can also set alarms in various time zones, set the clocks to change at Daylight Saving Time (or not, if you don't observe DST like Arizona residents) and sleep timers in different cities.

The World Clock is only available on newer iPods like the iPod Nano and iPod Video.