Silverlight Streaming by Windows Live offers a free streaming and application hosting solution for delivering high-quality, cross-platform, cross-browser, media-enabled rich interactive applications (RIAs). With the ability to author content in Microsoft Expression Encoder and other third-party editing environments, Web designers maintain complete control of the user experience.

Now the expression studio 2 Beta is available for download.

Benifits of the Silverlight :

1.Enable rapid application development
2.Use Microsoft or third-party tools
3.Standard scripting languages
4.Extensive API library
5.Create and deliver differentiated user experiences
6.No branding or user interface restrictions
7.Up to DVD streaming quality
8.Get global scale quickly and cost effectively
9.Free streaming and application hosting for up to 10 gigabytes (GB)
10.Immediate high-performance, global-scale application delivery

More resource about : www.microsoft.com/silverlight