Silverlight 2.0

key features:
Compelling cross-platform user experiences
Deliver media experiences and rich interactive applications (RIAs) for the Web that incorporate video, animation, interactivity, and stunning user interfaces.
Seamless, fast installation for users, thanks to a small, on-demand, easy-to-install plug-in that is under 2 megabyte (MB) in size and works with all leading browsers.
Consistent
experiences between Windows-based and Macintosh computers without any additional installation requirements.
Create richer, more compelling Web experiences that take greater advantage of the client for increased performance.
Stunning vector-based graphics, media, text, animation, and overlays that enable seamless integration of graphics and effects into any existing Web application.
Enhance existing standards/AJAX based applications with richer graphics and media, and improve their performance and capabilities by using Silverlight.