Hey again,
I tend to always spend some time looking up the latest Office / Outlook updates, and found this following link from the office center on TechNet to be much useful.
It has a nice table of the latest Service Pack, Latest Public Update and Latest Cumulative Update for Office 2003 / Office 2007 / Office 2010
http://technet.microsoft.com/en-us/office/ee748587 - Update Center.
Enjoy !