Here is the launch blurb:
Microsoft® Expression® Studio opens up a new world of creative possibility. Its professional design tools give you the freedom to make your vision real—whether you’re designing for standards-based Web sites, rich desktop experiences, or Silverlight. Includes Expression Web, Expression Blend, Expression Design and Expression Encoder.
Microsoft is changing interactive development, deployment, and delivery forever with the latest release of the Microsoft® Silverlight™ platform and Microsoft® Expression® design tools. SketchFlow, the dynamic prototyping feature found in Expression Studio 3, revolutionizes the speed and efficiency by which you can prototype the vision for an application. Out-of-browser support allows Silverlight applications to run on Windows® or Mac desktops and provides users with online and offline access to their favorite content, while developers don’t have to rebuild applications on another platform. The smooth streaming capabilities delivered through Silverlight 3 dynamically detect and seamlessly switch, in real time, the video quality of a media file that a Silverlight player receives based on local bandwidth and CPU conditions.
Transform your vision, creativity, and energy into reality.
Download Silverlight 3 and Expression 3 to see for yourself!