If you are still running Windows Server or Workstation 2000 then put July 13th, 2010 in your calendar. That is the last day that Microsoft will be doing security fixes for that operating system. Not a big deal you think? Go do some searching to see how many NT4 users wet their pants over the lack of security fixes for various things like Conficker recently. It’s not MS’s fault: every software company draws the line over support after a certain amount of time. Anyway, 10 years is a long time to support something.
Other important ones include end of life for ConfigMgr 2007 RTM (pre service pack) on July 14th 2009 and SQL 2005 SP2 on January 12th, 2010.