I found this somewhat inadvertently. Things are sparse at the moment, but I see that the forums on the Windows Forms website will be moving the the MSDN site. I wonder if this is the eventual future for Microsoft's newsgroups? What else may be moving?
A welcome message says is reasonably enough: "Welcome to the Microsoft Forums for Visual Studio 2005 Q & A. Many of you might recognize some similarity with the Asp.Net Forums. We've taken the 2.0 version of that code base and extended upon it to include Q & A handling, Passport authentication, integration with the VS 2005 Beta 2 Help Viewer and several other features. What you are viewing now is a preview of the Microsoft.com hosted beta web forum solution.
"As a preview Beta, there are still several bugs we are working through. We appreciate your patience as we work through these."
Moderated forums are a good idea.