Silverlight4 Tools for VS2010正式版下载地址？

http://www.microsoft.com/downloads/details.aspx?FamilyID=bf5ab940-c011-4bd1-ad98-da671e491009&displaylang=en

File Name: Silverlight4_Tools.exe
Version: 30319.157
Date Published: 4/13/2010
Language: English
Download Size: 30.6 MB

Overview
This package is an add-on for Visual Studio 2010 to provide tooling for Microsoft Silverlight 4 and RIA Services. It can be installed on top of either Visual Studio 2010 or Visual Web Developer 2010 Express. It extends existing Silverlight 3 features and multitargeting capabilities in Visual Studio 2010 to also create applications for Silverlight 4 using C# or Visual Basic. Note that this is a second Release Candidate (RC2) for the tools; the final release will be announced in the coming weeks.

Silverlight 4 Tools for Visual Studio 2010 includes several features:
Support for targeting Silverlight 4 in the Silverlight designer and project system
RIA Services application templates and libraries
Support for Silverlight 4 elevated trust and out-of-browser applications and other new Silverlight 4 features

This download will install all components necessary for Silverlight 4 and RIA Services development:
Silverlight 4 developer runtime (final release)
Silverlight 4 SDK (software development kit, final release)
Update for Visual Studio 2010 and Visual Web Developer Express 2010 (KB976272, pre-release)
Silverlight 4 Tools for Visual Studio 2010 RC2
WCF RIA Services for Silverlight 4 RC2

The final release of Silverlight 4 Tools will be made available in the near future.
(注意，这个是SL4 RC版本的，正式版将会在近期发布)