Preface to SMIWEP-MATeS'06

This workshop is the result of joining the two workshops "Web Services Modeling and Implementation Using Sound Web Engineering Practices" (SMIWEP) and "Methods, Architectures & Technologies for e-Service Engineering" (MATeS), which were originally proposed in conjunction with the ICWE 2006 conference. As a result of the selection process of both workshops, the six papers included in the proceedings were accepted and presented on July 10th, 2006. The workshop had plenty of time for discussion and as a main result of these discussions there was a proposal for topics to be covered in the e-services research agenda for the next year