Everyone states the time they are normally online, in GMT (G for Greenwich, not Georgia!). That way, you can obtain a good bet for when you're likeliest to find most people online. Also, if you're looking to talk to someone in particular (I know you all want my virtual autograph), you know when to find them.
This bit of information could even be added to people's profiles. Whatchya think, Jon?
Kingdavid
Registered User.
1500hrs - 1800hrs GMT.