The ultimate vision for eBusiness is an Internet-based global market place, accessible to all enterprises, regardless of size and geographical location, where automatic cooperation and integration among firms are allowed and enhanced. A powerful mean for these purposes is represented by sharing, reusing and composing value-added services made available on the Web, i.e. Web services. In this scenario, by making the Web content machine accessible and understandable, semantic Web services aim to provide efficient and effective Web service automatic discovery, selection, and composition. As part of the NeP4B project, in this paper we propose an architecture to address these issues in a flexible and scalable P2P network.