During my Building WPF Applications in Visual Studio 2008 and Expression Blend webcast on Wednesday I mentioned that Expression Blend is part of your MSDN subscription.  There was some confusion in the Q&A around what level.  According to http://msdn2.microsoft.com/en-us/subscriptions/aa718657.aspx, Expression Blend & Web show up in Visual Studio 2008 Professional with MSDN Premium and above.