I'm not sure if this will work for anyone else but I found a cool trick when mucking around with MobileFinder. Basically I managed to get a volume icon to appear when changing the volume on music. The icon looks much like the one on Macs when you increase the volume. How I did it was open Music (it works with the iPod.app as well, I tried both) start a song the leave the song running and open MobileFinder. Navigate to your applications folder and double tap mobileMusicPlayer.app. Finder should close and Music should open. Now increase and decrease the volume. The little volume icon should appear. Please post if this worked or not.