To create robust distributed service with WCF it is very essential to understand WS-* specifications. List of Web service specifications - http://en.wikipedia.org/wiki/List_of_Web_service_specifications In .NET this supports as Web Services Enhancements...
Those who are familiar ASN.NET/WinForm development and .NET Websevice to know better way WCF by comaring with WS, this arcticles will help a lot... Comparing ASP.NET Web Services to WCF Based on Development http://msdn.microsoft.com/en-us/library/aa738737...
I found these two links are very much useful for the foundation level atleast to paly with these... http://www.topxml.com/soapformatter/default.asp http://www.xmlme.com/XmlWebServices.aspx?tabindex=4&tabid=11