In addition, the beta for Expression Studio 2 is available. Expression Web includes support for PHP. Expression Web, Expression Blend, Expression Media Encoder, and Expression Design all include support for Silverlight 2. You can access the Expression Blend 2.5 March 2008 Preview which includes the full suite along with a number of programs to help users get started.
To learn more about how Expression Blend works with Silverlight 2, see First Look Using Expression Blend with Silverlight 2. For tutorials on Silverlight and how you can do cross platform, cross browser development, see First Look at Silverlight 2.