What has everyone found to be the most effective way of customizing the menu bar? Personally I'd like to have certain extras enforced on the menu bar, but allow the user to add additional ones if they like. For example:
Keychain status, AirPort, HomeSync, Battery, Clock, Volume, VPN
I've seen that "defaults write com.apple.systemuiserver menuExtras -array-add "<Extra>.menu"" will work. But it lacks the ability to see if that extra is already in the menu (so i get multiples if i just re-run it).


