After the announcement of Silverlight 2 release, Microsoft has now announced the release of Expression Blend 2 Service Pack 1 – a tool for harnessing the power of XAML, .NET framework 3.5 Service Pack 1 and Silverlight 2 to deliver compelling user experiences for connected desktops and the web.
Expression Blend 2 with Service Pack 1 fully supports the newly released Silverlight 2. SP1 exposes two new features of the platform, control skinning and the Visual State Manager, which for the first time allows designers to take complete control of the interaction model of their Silverlight 2 based applications.
You will first have to install Expression Blend 2 and then upgrade it to Service Pack 1.
Download Microsoft Expression Blend 2 Service Pack 1