The official name as well as site is now out for Silverlight, which used to be called WPF/E.  Lookin' good!

• http://on10.net/Blogs/tina/out-with-wpfe-in-with-microsoft-silverlight-this-has-just-been-announced/
• http://blogs.msdn.com/tims/archive/2007/04/15/introducing-microsoft-silverlight.aspx
• http://blogs.msdn.com/somasegar/archive/2007/04/15/silverlight-the-next-generation-web-media-experiences.aspx