Blend for Visual Studio 2012: Updated UX Tool for Windows 8 Applications
Immediately following the recent releases of Windows 8, Visual Studio 2012 and .NET 4.5, Microsoft has announced the new Blend for Visual Studio 2012. It is included with all versions of Visual Studio 2012, including Express.
Microsoft is working on an updated version of Blend for Silverlight, WPF, and SketchFlow projects, which are only supported in Blend 4. That version is currently in developer preview for Visual Studio 2012.
Doc List Oct 25, 2014