Silverlight is a new generation platform from Microsoft for developing highly interactive and visually appealing websites without requiring the huge development effort needed by more established web technologies such as JavaScript. Silverlight is really ‘WPF for web sites’. Silverlight is built on a lightweight version of WPF and has many of the advantages of WPF. With Microsoft’s weight behind Silverlight it seems certain that it will rapidly become the platform of choice for many web developers.

There is a wealth of information about Silverlight at www.silverlight.net

Also see Microsoft SilverLight