Enhancements include:

  • Windows Presentation Foundation interoperability CAB extensions  and View with presenter recipe
  • Offline application blocks and recipes; the application blocks support asynchronous calls to WCF web services.
  • Richer ClickOnce Deployment capabilities
  • Enhanced guidance packages which includes code generation Visual Basic .NET 2005 
  • Improved installation with a new dependency checker

More details here.

-Marc