I need to post this because I've gotten this question in email a few times. The information here was gathered from the MSDN Product Comparison page located here.

Here's a table which should help identify which Expression products are available for each MSDN subscription level. If you want to change your MSDN subscription level or have other questions about your MSDN account you can contact MSDN customer service at 1-800-759-5474.

 

Subscription Level

Expression Product(s) Available

Visual Studio Team System 2008 Team Suite with MSDN Premium Expression Studio (includes Expression Web, Expression Media, Expression Design and Expression Blend)
Visual Studio Team System 2008 Development Edition with MSDN Premium Expression Web, Expression Blend
Visual Studio Team System 2008 Architecture Edition with MSDN Premium Expression Web, Expression Blend
Visual Studio Team System 2008 Test Edition with MSDN Premium Expression Web, Expression Blend
Visual Studio Team System 2008 Database Edition with MSDN Premium Expression Web, Expression Blend
Visual Studio 2008 Professional with MSDN Premium Expression Web, Expression Blend
Visual Studio 2008 Professional with MSDN Professional Expression Web, Expression Blend
MSDN Operating Systems None