What are the new features of Silverlight 4

• Support for Google's Chrome browser.
• Web cam and microphone support.
• Printing support.
• Full keyboard access while running in full-screen mode.
• Programmatic access to a user's local document folder.
• Improved mouse support, including right button support and mouse wheel support.
• Elevated trust and support for local Component Object Model (COM) objects.
• New notification support to display messages to end users.
• New and enhanced controls such as a RichTextBox and an enhanced DataGrid control.
• New support for implicit theming of controls.
• New hosted browser support for rendering HTML inside Silverlight.
• WCF data layer enhancements.
• Localization enhancements with bi-directional text.
• Support for Managed Extensibility Framework.
• Enhanced data binding support.
• Enhanced animation effects.
• Clipboard and drag and drop support.
• Deep Zoom performance enhancements.
• WCF Rich Internet Application (RIA) Services.
• Content protection for H.264, and support for playing offline DRM protected media.