There will be a repeat session of the Office 12 XML File Formats on Thursday @ 1:30. Here's the info:

CLI393R - A Glimpse at the Direction of Microsoft Office Open XML Formats
June 9, 1:30 PM - 2:45 PM
N 210 B
Brian Jones, Joe Andreshak

This session will give you an in-depth look at the future capabilities of file formats in the Microsoft Office System, specifically the Microsoft Office Open XML Formats. The Microsoft Office 2003 Editions introduced a new XML file format for Word 2003 - that was just the beginning. In "Office 12" Microsoft will introduce default XML file formats for Excel, Word and PowerPoint. This session will give details on how this new direction in document storage will directly affect you. People will have the ability to freely generate and consume Office documents without being tied into any specific Microsoft software. A new level of transparency will allow customers to truly own the file content. You can always know and control what is inside of your files. We are designing format capabilities with the future in mind, while improving many dimensions of performance and increasing the quality. The session will cover how this affects deployment, cross-version compatibility and solution development.