Thomas Erl is the world's top-selling SOA author, Series Editor of the Prentice Hall Service-Oriented Computing Series from Thomas Erl, Editor of SOA Magazine, and member of several OASIS technical committees driving SOA standards. Raj Balasubramanian is an Enterprise IT Architect, SOA Advanced Technologies, IBM Software Group. Satadru Roy is a Technology Architect and Product Engineer with BEA Systems, Inc. Dr. Philip Thomas, MBCS CITP, is a Solutions Architect, Senior IT Specialist, EMEA WebSphere Lab Services, IBM. Andre Tost is an STSM, Enterprise Integration Solutions, IBM Software Group. Clemens Utschig-Utschig is Senior Principal Product Manager, Oracle.