In this paper we propose a novel way of supporting occasional meetings that take place in unfamiliar public places, which promotes lightweight, visible and fluid collaboration. Our central idea is that the sharing and exchange of information occurs across public surfaces that users can easily access and interact with. To this end, we designed and implemented Dynamo, a communal multiuser interactive surface. The surface supports the cooperative sharing and exchange of a wide range of media that

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... an be brought to the surface by users that are remote from their familiar organizational settings. Public spaces provide new challenges for supporting interaction with large displays. Within such spaces, any user can walk up and make opportunistic use of the display, Volume 5, Issue 2