Microsoft provided us (TechEd Attendees) with the first white papers on the new Office 12 XML file format standard. You can get more information at http://www.microsoft.com/office/preview/default.mspx. This is a good move in my opinion. Take a look at the whitepaper which is available at the above link to get an idea of what they have in mind. There is some advanced opportunity here to get the jump on tools and utilities for the new Office 12 version so read away and get the wheels turning.
Goodbye from Orlando!