Thanks to Monte for the heads up on this
Well today certainly is the day, WinBeta has whispered in our ears to let us know that they've got hold of a copy of Office XP SP3. They can't confirm whether this build is the final although some are claiming it is. Upon installing the update it will bring your Office XP Installation up to 10.6308.6403. Check out some of the screenshots below.
Screenshot: >> Click here <<
News source: Office XP SP3 - WinBeta.org