Cheers Kobayashi for the heads up here on this one, Microsoft Office XP Service Pack 1 (SP-1) is out and ready for download!
Microsoft Office XP Service Pack 1 (SP-1) provides the latest updates to Office XP. Office XP SP-1 contains significant security enhancements, as well as improvements in stability and performance. Some of the fixes that are included with Office XP SP-1 were released earlier as separate updates. This service pack combines the updates into one integrated package and includes a number of other changes that are designed to improve the reliability and performance of your Office XP programs.
And while having a poke around on Microsoft"s Download site, I found this little jem... The workbook Office XP Service Pack 1 - Changes summarizes the updates and corrections to Microsoft Office XP applications and components provided with the Office XP Service Pack 1 (SP-1). The SP-1 Changes worksheet describes the changes that apply to particular applications and lists the files and languages affected by each change.