The direct translation of the acronym TOppS is Service Oriented Opportunistic Sensor Networks. The basic idea is to improve performance and robustness of sensor systems by automating processes for sensor connectivity, data analysis and data presentation. This should be facilitated by equipping the sensors with "plug and play" capabilities while the data itself should be presented in terms of services instead of individual data streams. Users of opportunistic sensors should furthermore be able to use sensors dynamically, i.e. depending on the user's purpose and sensor data needs, different sets of pertinent sensors may be used to solve the tasks. Service Oriented Architecture (SOA) enables a framework for a general description of sensor and sensor data, which will simplify decision support as well as automated monitoring and surveillance. The TOppS-project is a three year strategic project that aims to study and develop a prototype framework for achieving service oriented opportunistic sensor networks. This report aims at describing the ideas and vision of the TOppS project and introducing the different aspects of the TOppS concept. We review related technologies and current applied research and also exemplify the concept in a couple of scenarios. The report ends with our outlook and plans for coming years.