Cool! The MSDN Virtual Lab team has some Office 2007 labs available now:

• Creating Workflows for Windows SharePoint Services New!
  In this lab you will learn to:
  

  • Design a custom workflow
  • Build a custom workflow using the Windows Workflow Foundation plug-in
  • Deploy the workflow to Windows SharePoint Services

  Take this lab
• Introducing Content Types for Windows SharePoint Services 3.0 New!
  In this lab you will learn to:
  

  • Install a new farm
  • Configure global workflow settings
  • Provision new web applications

  Take this lab
• Understanding the 2007 Microsoft Office System User Experience and Interface Design New!
  In this lab you will learn to:
  

  • Become familiar with the new 2007 Microsoft Office system user interface

  Take this lab
• Programmatic Manipulation of the Microsoft Office Open XML Formats New!