自从9个月前Silverlight 2公布如今已有超过三分之一的网络设备安装有微软的Silverlight程序。7月11日微软正式公布最新的Silverlight 3以及Expression 3。
Silverlight 3更新内容包括：
Expression SketchFlow: Available to customers just four months after its initial debut at MIX09, SketchFlow provides
development teams unrivaled capabilities to rapidly prototype applications and take their ideas from concept to reality.
（加速原型应用程式将概念变为现实）Out of Browser: Silverlight 3 provides the seamless ability to add out-of-browser, connected and disconnected
scenarios for cross-platform applications, radically improving the productivity and capabilities over traditional RIAs.
（为跨平台应用提供脱离浏览器的脚本连接）IIS Smooth Streaming: As part of Internet Information Services 7.0 (IIS7) Media Services and combined with
Silverlight 3, IIS Smooth Streaming enables the industry’s first HDTV-quality (1080p) video experiences with rich interactivity
for both on-demand and live video.（能够打开1080p高质量、互动丰富的HDTV网络视频）
