The technology company Gate5 specialises in location-based applications for mobile terminal devices and the Internet. pReview collaborated with Gate5 to conduct a workshop designed to analyze the importance of specific factors in the design of the functionalities and interface for the »Zoomtown« application. The project also included an analysis of the requirements made on the application by users and operators and how these could be properly taken into consideration. One of the results was a meta-scenario of interface development guidelines and functionality.