Today, we are witnessing a new level of scale, complexity, and pervasiveness of software systems that are designed to support much more holistically complex processes. Much richer information is becoming available for processing, including raw data, proven facts and people's opinions. A multitude of interesting analytics methods are being developed to extract new knowledge from this plethora. In this paper, we examine some opportunities for smart service delivery that arise from the integration of sensor networks, service-oriented middleware and virtual worlds. 1 "Smart Systems" Today, we are witnessing a new level of scale, complexity, and pervasiveness of software systems. Tiny sensors, embedded in our environment, houses, clothes, and bodies, measure an unprecedented variety of environmental and physiological parameters. Social-networking platforms enable practically everyone to socialize online and publish their knowledge and opinions, giving rise to a multitude of ...