Cooperating Objects are, in the most general case, small computing devices equipped with wireless communication capabilities that are able to cooperate and organize themselves autonomously into networks of sensors, actuators and processing units to achieve a common task. Several areas could greatly benefit with the introduction of Cooperating Object technologies, ranging from automation (home, industrial, building) to healthcare and energy management. To exploit this potential the research community has to tackle various problems in various areas including hardware, algorithms and systems. In this paper we describe these research areas and their different challenges. Based on a survey, predominant work areas are selected that should receive the most attention.@en