Are you interested in learning more about XML support in Office 2003? There are some great labs available online to help people get more familiar with the XML support in Office. These labs are available to everyone, you just need to set up an account (which is "free and painless"). It's really cool, you don't even need to own a copy of Office, everything is provided for you.
Here's the link to the site: http://msdn.microsoft.com/vstudio/tryit/hosted/office/
Let me know what you think, and if there are other labs you'd like to see posted. I had forgot that these even existed. They are great for those of you new to XML, or if you don't have a copy of Office 2003.
After you've had a chance to play around with this stuff for awhile, let me know if there are concepts you'd like to know more about such as schema validation; schema library; XSLT; etc.