1. A method comprising the following steps, in combination: accepting as inputs: vehicular data about the position and operation of a plurality of vehicles, location data relating to businesses or other points of interest within a specified geographic distance of at least one route traveled by at least one of said vehicles, and preference data indicating preferences of a plurality of users, respectively, processing said vehicular, location and preference data, and automatically outputting instructions for selectively sharing, in accordance with said user preferences, information comprising or derived at least in part from said vehicular data.