Yesterday we released the Microsoft® Silverlight™ Tools for Visual Studio 2008 SP1. This package is an add-on for Visual Studio 2008 SP1 to provide tooling for Microsoft Silverlight 2.
But there is still RC1 (9.0.30729.143) version :(
check again ;-)
The link is broken... I am redirected to a German "Page not found" page and from there to Live Search.
strange, it works perfectly well for me. No corp net, but English OS and located in the US. Sorry for the hassle!