Invited Contributions -- Enabling Networked Knowledge -- Coordination and Agreement in Multi-Agent Systems -- Agents and Databases: A Symbiosis? -- Agents and Semantic Services: A Critical Review -- Agent-Supported Planning in Distributed Command and Control Environments -- Trust -- Towards Trust-Based Acquisition of Unverifiable Information -- Modeling Dynamics of Relative Trust of Competitive Information Agents -- A Formal Approach to Aggregated Belief Formation -- Applications -- Software Engineering for Service-Oriented MAS -- A Service-Oriented MultiAgent Architecture for Cognitive Surveillance -- Trust-Based Classifier Combination for Network Anomaly Detection -- A Distributed Generative CSP Framework for Multi-site Product Configuration -- MobiSoft: Networked Personal Assistants for Mobile Users in Everyday Life -- A Web-Based Virtual Machine for Developing Computational Societies -- Using the Wizard of Oz Method to Train Persuasive Agents -- ASBO: Argumentation System Based on Ontologies -- Coordination and Communication -- Controling Contract Net Protocol by Local Observation for Large-Scale Multi-Agent Systems -- Filter Allocation Using Iterative ECNP -- On the Use of Symbolic Data Analysis to Model Communication Environments -- Commitment-Based Multiagent Decision Making -- Negotiation -- Towards an Open Negotiation Architecture for Heterogeneous Agents -- Incrementally Refined Acquaintance Model for Consortia Composition -- Towards a Monitoring Framework for Agent-Based Contract Systems -- Collaborative Load-Balancing in Storage Networks Using Agent Negotiation.