Microsoft just posted Service Pack One for their Windows Office 2003 product. The update includes some previous bug fixes that has been released. It also includes performances and feature enchancements. I might download it later since I am so reliant on Outlook.
If you are not using Office 2003, don't sweat - you can download a free alternative at OpenOffice.org. The source code is available here for you to tinker with if you so wish.