This is a free service for users of VATSIM, the premier online virtual air traffic control organisation - its purpose, to provide free online status indicator images for use in forum signatures by pilots.
Please note that the VATSIM data is only updated every 10 minutes!
If you want real-time status updates, you're out of luck here - we have to respect the bandwidth of our data provider! But hey, we're free!
VatSimSigs allows you to select your own images to reflect your online/offline status.