There is another post dedicated to the new PivotViewer control, but this time it's coming from Lee's corner.
Here are the basic walkthrough to get up and running with PivotViewer Control
After getting all the stuff as mentioned in the faq, Open VS2010 and create a silverlight application. Add a website hosted in IIS adding a clientAccesspolicy file as needed. Make sure it is set a startup project. Go the Property pages and select silverelightApplications and add a test page. set the testpage as startup page. [...]