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.
Download: Microsoft Office XP Service Pack 1 (17.4mb)
View: Microsoft Office XP SP1 Overview Site
View: Office Download Center (SP1)
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.
View: Office XP Resource Kit - Changes in Office XP SP-1
Download: XPSP1Chg.exe (92kb) [double-click the file or use a Zip Utility for Excel spreadsheet OfficeXP_SP1Changes1.xls]