The future Internet will be characterised by a pervasive diffusion of devices with heterogeneous capabilities and resources. Users will carry personal mobile devices (smartphones, PDAs, cameras) bundling several wireless interfaces, supporting computationally intensive tasks, and powerful tools to produce multimedia content. Other types of devices with networking capabilities will be also available in the environment (sensors, fixed cameras, etc) featuring more specialised resources.The resulting networking environment, seen as a whole, will thus be characterised by a multitude of heterogeneous resources. The goal of SCAMPI is to enable each user to avail not only of the resources available on its own device, but also to opportunistically exploit the other resources of the environment, including those on the other users' devices, in a trustable and secure way. SCAMPI will thus enable users to compose the functionality of the different resources available in the network, enjoying much richer functionality than what available on their own device.To realise this vision, SCAMPI develops the technical solutions for a service platform in mobile and pervasive opportunistic networks. Service is used as the main abstraction for using resources. We focus on opportunistic networking environments, where the network is formed by the devices spread in the environment, events such as long disconnections and partitions are the rule, and no simultaneous multi-hop paths can be guaranteed. Thus, SCAMPI generalises the pure opportunistic networking concept, and investigates the novel concept of opportunistic resource usage in challenged networks.The "human factor" (information about the social relationships among users) is a key dimension of the project. On one hand, because SCAMPI leverages social awareness to optimise its technical solutions. On the other hand, because SCAMPI will enable novel services enhancing current mobile online social networking applications.