Ever wanted to just quickly log in and check your email only to have a bunch of friends instantly hit you up on chat, well now you can do just that, just switch yourself to invisible. A new option that was added to Gmail Chat will let you switch yourself from visible to invisible. The nice part about this is that while you are logged in and invisible you will still be able to see your friends status, they just cannot see you, meaning you may actually be able to get your work completed.
This new option works in the latest version of Gmail on Firefox 2 and IE7. The only limitation seems to be that you cannot switch yourself to invisible if you are logged in using another (gadget or desktop application) Gmail Client.
Via [Google Operating System]