iPod Hint: Quick Playback Access With a Double-Click

Okay, so I’m probably the last person to find this (and it’s probably in the manual which I’ve never bothered to read) but I’ve discovered that a doubleclick on the iPod’s circular button brings up a little control panel for the music settings, allowing you to resume listening, skip forwards and backward and adjust the volume.  I find it particularly useless when battling with apps which won’t let you listen to what you’d like to listen to.