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Use of Wi-Fi-capable mobile handheld devices is gaining momentum in uni-versity campuses. In addition, students often work as a group to perform collaborative tasks on campus. Consequently, there is a demand for group communication applications in mobile devices and a need to provide middle-ware support for such group communication over mobile wireless networks. This paper presents three common grouping scenarios as observed in uni-versity campuses. We then present data dissemination strategies for these grouping scenarios. We concentrate on update based applications such as file repositories, version controlling systems and calendar. Hence, we present protocols for short message dissemination such as control messages and up-dates. We evaluate the effectiveness of the protocols through an Android based middleware implementation as well as simulations. Our experiments demonstrate the effectiveness of the protocols in real life scenarios. i