The Internet is expected to ultimately interconnect billions of people and trillions of devices. Over recent years, ‘Web-of-Objects’ and ‘Internet-of-Things’ initiatives have emerged, primarily aimed at machine-to-machine or device-to-device interactions using standard communications protocols. As yet, their rate of adoption in commercial products and services is fairly low. The challenge undertaken by the SITAC project is to create a unifying architecture and ecosystem – comprising platforms, tools and methodologies – which enables seamless connection and co-operation of many types of network-connected entities, whether systems, machines, devices or humans equipped with handheld devices. The project will innovate through the use of the ‘social networking’ paradigm to facilitate and unify interactions both between people and devices and between devices. It will propose a distributed framework for enabling the web-based service representation of smart spaces and objects they include.