Electronic business has a strong influence on the relationships between partners within supply chains. Small and Medium Sized Enterprises (SMEs) need an affordable, integrated set of software tools to support integration of their supply chains and to take advantage of the new ways of doing business in the electronic business environment. The paper reviews evolution and current trends in supply chain integration and reviews some of the underlying Internet technologies supporting SMEs in building integrated supply chains. These concepts are then used to explore how to build integrated supply chains based on ebXML protocol architecture that can be applied by SMEs that want to test new opportunities created by the Internet. Keywords Supply chain integration, SMEs, e-business, ebXML, Web Services, registry, repository