Daylight Saving Time resources index: (Feel free to let me know of useful DST links: cameron dot sturdevant shift-2 ziffdavisenterprise.com)
Shops that use Microsoft Outlook 2000, 2002 and 2003 should download the Time Zone Data Update Tool for Microsoft Office Outlook.
The Sun Developer Network DST
Microsoft provides a labor-intensive set of instructions for manipulating the registry in Windows 2000 Server to accommodate DST 2007.
Unofficial Windows 2000 DST time patch from IntelliNavigator's IntelliAdmin.
Nortel (Nortel customers are probably used to this, but having to log in for DST notes seems a bit pedantic.)
Not the official site, but interesting just the same for VMware. Most of the VMware discussion forums give the perfectly reasonable advice of treating virtual systems exactly as you would physical systems. VMwarewolf addressed the question of dealing with a VMware ESX server.
Some interesting time zone references: A public domain time zone database sometimes known as the Olson database.
My favorite site for persnickety information and trivia about DST. Check out the section on "spelling and grammar" to get the answer to the question: Daylight Savings Time or Daylight Saving Time (with no "s".)