Principles of Service Design

The Principles of Service Design series has been developed to communicate best practices and sample codes when relevant. Microsoft now released some papers which provides fundamental principles for designing and implementing Web services, including a brief review of Service Oriented Architecture (SOA) concepts and a detailed discussion of several patterns and anti-patterns that developers can leverage when building Web services. Guidance is applicable to any programming language or platform for which Web services can be developed and deployedr.

More at http://msdn.microsoft.com/architecture/default.aspx?pull=/library/en-us/dnbda/html/SOADesign.asp