Be sure and take a look at the following articles and downloads for both the Office 2010 Backstage view and the 64-bit version of Office. Also stay tuned for additional articles, code samples, and videos related to the Office 2010 UI.

Download: Office 2010 Schema: Fluent User Interface Schema (http://download.microsoft.com/download/F/F/3/FF36D32F-4080-494B-83B8-49DADC68A999/Office2010FluentUISchema.exe)

Download: Office 2010 Help Files: Office Fluent User Interface Control Identifiers (http://download.microsoft.com/download/0/7/B/07BF35CE-4FA1-4DED-B4AA-3801D4E49F89/Office2010ControlIDs.exe)

Introduction to the Office 2010 Backstage View for Developers (http://msdn.microsoft.com/en-us/library/ee691833(office.14).aspx)

Customizing the Office 2010 Backstage View for Developers (http://msdn.microsoft.com/en-us/library/ee815851(office.14).aspx)

Deploying a Customized Ribbon and Quick Access Toolbar in Office 2010 (http://msdn.microsoft.com/en-us/library/ee704589(office.14).aspx)

Targeting User Interface Solutions to the 2007 and 2010 Releases of Microsoft Office (http://msdn.microsoft.com/en-us/library/ee704588(office.14).aspx)

Customizing Context Menus in Office 2010 (http://msdn.microsoft.com/en-us/library/ee691832(office.14).aspx)

Ribbon Extensibility in Office 2010: Tab Activation and Auto-Scaling (http://msdn.microsoft.com/en-us/library/ee691834(office.14).aspx)

Compatibility Between the 32-bit and 64-bit Versions of Office 2010 (http://msdn.microsoft.com/en-us/library/ee691831(office.14).aspx)

 Enjoy!