Breakaway (http://balthamos.awardspace.com/applications/breakaway.html) is a nice little convenience app for the Mac. When you have it you can quickly pause your music in iTunes by removing your headphones. You can start the music playing again by either hitting play in iTunes or by plugging your headphones back in. I find this a little easier way to pause and restart my music when people come to my desk rather then hunting around for my mouse to pause it in iTunes. It won't change your life or anything, but it's a nice little touch.