>When I select a day in the Calendar, say, NET forum for today, I see two messages (one 10/11/2008 23:27) and another for 10/11/2008 20:23
This should be displayed as per your own time zone setting as defined in the account profile. Or, is there another issue with it? The server is based in Montreal. As for the data storage, it is EDT or EST depending on daylight saving time.