SilverBullet #7 - System.Windows.Messaging

Most often Silverlight applications take up the whole screen and the page that is hosting the application contains only one control. It is possible to split you application into smaller controls. Silverlight 3 controls can communicate over the boundaries of tabs inside a browser, and even over the boundaries of the browsers itself. Sending messages back and forth between IE, Firefox, Chrome and even Out-Of-Browser.