WCF Service Factory
February 2007 MSDN Magazine contains a good introduction to WCF Software factory by Aaron Skonnard. You can find the article here - http://msdn.microsoft.com/msdnmag/issues/07/02/ServiceStation/default.aspx. The December edition had an article on Web services Software Factory (http://msdn.microsoft.com/msdnmag/issues/06/12/ServiceStation/).
The Service Factory is available on code plex site here - http://www.codeplex.com/servicefactory.