This may be old news, but it is a handy reference for OpsMgr admins, when asked to monitor for specific events from security event logs:
Windows Server 2003: http://technet.microsoft.com/en-us/library/cc163121.aspx
Windows Server 2008: http://www.microsoft.com/download/en/details.aspx?id=17871
Windows Server 2008 R2: http://www.microsoft.com/download/en/details.aspx?id=21561