International Federation for Information Processing This book presents the proceedings of the first IFIP WG 6.8 conference on Wireless Sensor and Actor Networks held in Albacete, Spain. The papers selected to be included in this volume illustrate the state-of-the-art and current trends in the area of wireless sensor and actor networks. The comprehensive program was organized into eight topics: - Actors. - Applications. - Security. - Energy. - Quality of Service. - Localization. -Middleware. - Protocols.