http://blogs.msdn.com/b/publicsector/archive/2006/03/22/558049.aspxWPF/E is a subset of WPF focused on interactive content that works cross platform. WPF/E can be hosted in multiple browsers and on multiple operating systems. That's right, including operating systems other than Windows. WPF/E, like WPF, uses XAML. Unlikeen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)