Project Silk September 2011 release is now available for free dwonload from the Microsoft's Download Center.
"Project Silk provides guidance for building cross-browser web applications that are characterized by an intentional design, rich interactivity, and a responsive UI, resulting in an immersive and engaging user experience. Such applications take advantage of the latest web standards, including HTML5, CSS3, and ECMAScript version 5, and modern web technologies such as jQuery and ASP.NET MVC3," Microsoft stated.
"The concepts explained in the Project Silk written guidance are demonstrated via a real-world customer-facing web application, the Mileage Stats Reference Implementation, which allows users to track metrics about their vehicles."
Windows Internet Explorer 9 further enriches the user experience by taking full advantage of hardware-accelerated graphics processing.
You can download Project Silk - September 2011 here.