Microsoft has released Visual Studio 2008 SDK 1.1 Beta
The Visual Studio 2008 Software Development Kit (SDK) 1.1 Beta includes tools, documentation, and samples for developers to design, build, test and deploy extensions for Visual Studio 2008 Service Pack 1 Beta. You can also use the Visual Studio 2008 SDK 1.1 Beta to create custom tools environments based on the Visual Studio 2008 Service Pack 1 Beta Shell.Visual Studio 2008 SDK 1.1 Beta