If you want to provide some feedback on Visual Studio Orcas, check out the following forums:
Visual Studio Express: http://forums.asp.net/1125/ShowForum.aspx
Visual Studio: http://forums.asp.net/1112/ShowForum.aspx
Hmm, I don't know about feedback on features besides Visual Studio, but this would seem like a good place to start. Thanks guys.
Update: There are also a series of forums at MSDN. The url is