Visual Studio 2008 SDK Version 1.0 Released

Microsoft Downloads - Visual Studio 2008 SDK Version 1.0

"...

This is the official software development kit that allows developers to integrate tools, editors, designers, languages, and other features inside Visual Studio 2008.
Key features in the VS 2008 SDK include:

• Visual Studio Shell development support
• Enhancements in Domain-specific Language tools
• Visual Studio Package development and testing support for C++, C# and Visual Basic
• Code samples and documentation covering toolbox controls integration, general IDE integration, Domain-specific Languages (DSL), Team Foundation Server extensibility, Data Designers extensibility , and other areas
• Support for Windows Vista

For more information and news about VSX (Visual Studio Extensibility), visit the VSX Developer center at http://msdn.com/vsx and the VSX Team Blog at http://blogs.msdn.com/vsxteam."

This is one of those, "I'll need this download one day" posts...

Related to this download are these downloads; 
Microsoft Visual Studio 2008 Shell (integrated mode) Redistributable Package
Microsoft Visual Studio 2008 Shell (isolated mode) Redistributable Package