Apple adds volume limiting to iPod
(The Apple Core | ZDNet.com)
Yesterday Apple released iPod Software 1.1.1 that adds a new "Volume Limit" feature.
“The new 1.1.1 software update for iPod nano and fifth generation iPods provides an easy way for you to set a maximum volume limit to prevent the volume from exceeding a certain level.
You can also assign a combination to prevent the setting from being changed which is ideal for parental control.”