Ronnie Saurenmann, one of our architect evangelists in Switzerland, sent a link (via email) to a Hands-on Lab (HOL) on how to build an Outlook 2007 UI look and feel using Windows Presentation Foundation. He says this was done "90% in Blend and 10% manual XAML" tweaking. There's an XBAP demo of the app in case you want to see the results, along with a lab manual with   read more »