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In this paper we propose a new model of message proliferation among many people. We assume that these people carry short-range wireless devices and move around in a certain area such as a shopping mall. By utilizing the intrinsic nature of mobility of people, messages originated from service providers are disseminated in such a way that a person transmits the retained messages to nearby people who have interest in the messages. We call such a system SSWD, which stands for selection of advertised services using wireless devices. This paper describes the design of SSWD and discusses designing issues for people-supporting ad hoc networks.