A group blog from members of the VB team
Paul O’Rear, a Program Manager on the Library Experience team, describes the changes to the Microsoft Help Viewer planned for Visual Studio 2010 SP1. He demonstrates the new functionality of the viewer in an early build of Help Viewer 1.1.
See Microsoft Help Viewer – Updates Planned for Visual Studio 2010 SP1
You can learn more in The Story of Help in Visual Studio 2010