This article of Mahesh Sabnis demonstrates how a binary encoded WCF service can be consumed in Silverlight 3.0 client for messaging optimization.
With VS 2010, lots of new features have been introduced for developers to make their life easier. But one of the very exciting feature provided is inbuilt support to Silverlight. For all those who use VS2008 and Silverlight 3.0 may know that you need to install Silverlight 3.0 SDK and toolkit externally. VS2008 does not provide any drag-drop support for Silverlight controls on the designer canvas, you can drag-drop XAML of Elements in the XAML designer or need to use Expression Blend to design.