We describe the DataTour system, a prototype of Location-Based DataStore over the Orange Community Cloud. DataTour aggregates heterogeneous non-dedicated storage and computing resources scattered in a network covering a wide geographical area. DataTour provides efficient data access for Location-Based Services (LBS). DataTour optimizes data locality in order to achieve bounded query response time. We present prototype design and implementation. Then, we demonstrate our dynamic data placement algorithm for several realistic workloads and under several different strategies about overload decision and data selection.