1. A method of estimating the likelihood of a Wi-Fi enabled device being located within an estimated geographical area, the method comprising: the Wi-Fi enabled device receiving signals transmitted by at least one Wi-Fi access point in range of the Wi-Fi enabled device; consulting a reference database to determine for the at least one Wi-Fi access point from which signals were received a last-known estimated position of each of the at least one Wi-Fi access point and time information associated with each of said last-known positions for describing the age of each said last-known position relative to other information in the reference database; estimating, based on at least one of the last-known positions, associated time information, and number of Wi-Fi access points from which signals were received, the likelihood of the Wi-Fi enabled device being located within an estimated geographical area; and displaying on a display device information based on the estimated likelihood of the Wi-Fi enabled device being located within the estimated geographical area.