Foi lançado oficialmente a versão final do Internet Explorer 8.0, assim como a Microsoft também disponibilizou a versão 3 do Silverlight.

Internet Explorer:
http://www.microsoft.com/windows/internet-explorer/default.aspx

Silverlight

Runtime:
http://go.microsoft.com/fwlink/?linkid=143433

Silverlight 3 Tools for Visual Studio 2008 SP1:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=11dc7151-dbd6-4e39-878f-5081863cbb5d

SDK:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=d09b6ecf-9a45-4d99-b752-2a330a937bc4!

Documentation:
http://msdn.microsoft.com/en-us/library/cc838158(vs.96).aspx.

Blend 3 Preview:
http://www.microsoft.com/expression/blendpreview