http://blogs.msdn.com/b/jgalasyn/archive/2010/06/07/expression-blend-4-now-available-for-download.aspxExpression Blend 4 makes it easier than ever to design your WPF and Silverlight apps. Here are the official bullet points: Create rich web experiences, games, desktop apps, and more. Design apps that use the full power of Silverlight. Take your ideasen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)