By way of Don Smith. Details:
The two features that jumped out at me are support for the Windows Communication Foundation (WCF) and "WSDL-first support." The direct download is here.
UPDATE: Here are two really good MSDN articles on the Service Factory from Aaron Skonnard:
Web Service Software Factory http://msdn.microsoft.com/msdnmag/issues/06/12/ServiceStation/
The Service Factory for WCF http://msdn.microsoft.com/msdnmag/issues/07/02/ServiceStation/default.aspx