I looked into this, and it appeared that to facilitate integration with Visual Studio help we would, for starters, have to re-host all of the help content into an MsHelp 2.0 project. Right now it is in a collection of Word documents, plus a .CHM help file that is generated directly from the source code. Moving the documentation source out of Word would impose problems in how it is maintained, and many processes would have to be relearned, re-invented, or created anew. It just seems that, for now, there are other aspects of the documentation on which our time and efforts will deliver greater value to our customers.
As you may know, we have recently gathered all of the help resources into a searchable HTML Help (.CHM) file. This is available from the DevForce start menu. Many find it actually more convenient than VS-integrated help.
Greg Dunn
Training and Documentation Manager
IdeaBlade