Earlier today Apple issued a software update for the iPod Nano 6th generation, which brings a useful feature to the device: you can now control music and radio playback using the Sleep / Wake button without looking at the screen.

With iPod software update version 1.1 for iPod nano (6th generation), you will be able to:

Completely turn off the iPod, rather than just put the device to sleep.

Control music or radio playback using the Sleep/Wake button without having to look at the device.

Another notes provided by Apple on the iPod Nano 1.1 update:

• When the iPod nano is off, you will not hear or be alerted to any alarm or reminder set on the iPod. When you turn iPod nano back on, alarms or reminders that haven’t yet expired will occur as scheduled.
• If you turn iPod nano back on within five minutes of when it was turned off, it will remember your music playlist and what was playing. However, if you turn iPod nano back on more than five minutes after it was turned off, the device will not remember what you were doing on the device or which application was active.

More information about the update available here.