"TechCrunch: Silverlight 4 In Beta. Supports Google Chrome.
Microsoft announced the availability of Silverlight 4 in beta at its Professional Developers Conference (PDC) today. Some of the new features include more fluid animations, Webcam, microphone and printing support, 200 percent faster start times than Silverlight 3, deep zoom and multi-touch support and more. It now also supports Google Chrome, even though it’s just a rounding error of a browser.
Some more details on Silverlight 4 features and its Chrome support. There are also notes of some success with Silverlight 3."