Windows 7: Programming Sync Providers That Work Great with Windows

I would like MS to include DataSet in the next version of SilverLight. We need DataSet to integrate our existing .NET application with the SilverLight. For example, in our development we use DataSet to work with Data such as returning DataSet to the caller and use DataSet to save data.
We cannot change and add all these methods simply because we need to use the SilverLight since this will create our jobs harder and double the works!
There are now updated videos about the WPF and Silverlight designer features available at https://channel9.msdn.com/shows/Continuum/WPF4Beta1DesignerForms/ and https://channel9.msdn.com/shows/Continuum/WPF4Beta1DesignerStyling/ - check them out and let us know what you think!
Mark