I prefer using
@RussM
's site, Reeftronics . Although he doesn't have the signature generator, his site will notify you if communication is broken between your controller and the monitoring. This often can mean there is a power outage. In a power outage, you won't get the notification from your controller of the power being out until it comes back on (unless you have a backup power source on your modem and router...and the internet connection isn't impacted by the power outage).
I am vehemently against putting controller status in forum sigs... they are big, distracting, and rarely are any concern or interest to anyone else. Do you give a hoot about what my tank's temperature is at? And I don't really care if your lights are on or not.
If you want to see your own controller's live status without opening the controller's web pages in your browser, check out the Vista/Windows 7 gadget created by Kenargo (Ken's Reef - Software Downloads) and/or the various smartphone apps.