According to Brian Harry[1] , he has been working with the BTS folks to get this put in place. He has been assured that this will be part of the R3[2] release of BizTalk Server that is due out next year. Finally, automated builds for BizTalk without all the hassle, I hope this definitely makes it into the product, as right now it is one more thing that makes people think BizTalk is not for .NET developers.
[2] http://blogs.msdn.com/stevemar/archive/2008/04/23/biztalk-server-platform-updates.aspx