1. A system for initiating a response to a location-based event, comprising: a first database for storing information corresponding to at least one mobile unit, at least a portion of the information indicative of the location of at least one mobile unit; and a rules system operatively coupled to the database, for applying a rule to the information to determine if a location-based event has occurred, and responsive to a determination that a location-based event has occurred, providing a response to a location-based services application.