With Microsoft Expression Blend 3 Preview, you can create Windows Presentation Foundation (WPF) applications for the desktop and Microsoft Silverlight 3 applications for the web.

Expression Blend 3 Preview is a major new release, taking the product in a number of new, important directions, such as on-the-fly sample data generation. We also added support for several Silverlight 3 features.

Expression Blend 3 Preview is a step on a long journey toward tools that are meant to empower designers to participate in the process of software creation in deep, meaningful, and creative ways.

Using Expression Blend 3 Preview, you, the designers, can make computers easier and more fun to use, and can delight customers with great applications and great content.

Read more at Expression Blend 3 Preview