ScottGu's Blog : Expression Products Added to MSDN
ExpressionがMSDNに追加されたそうです。
Expression Web and Expression Blend will now be available at no extra charge to all MSDN Premium Subscribers (this includes customers with the "VS Professional with MSDN Premium" subscription). This means many more developers will have awesome design tools for building great ASP.NET, WPF and "WPF/E" solutions.