1. A system for the management of network address books, comprising: a network address book (NAB) manager including a processor, a transceiver and data storage within a core network, said NAB manager being configured to manage network storage of content information of a plurality of users, wherein content information corresponding to respective ones of said plurality of users is stored in separate NABs in data storage; said NAB manager being configured to populate said data storage within said separate NABs with content information received from user devices; said NAB manager being configured to transmit at least some of said content information obtained from a first NAB in data storage that is associated with a first user, based on authorization of the first user, to another NAB in a second data storage that is located within said core network or within another network and that is associated with a second user; and said NAB manager being configured to receive a query from the second user for information related to the first user and to obtain said information from said first NAB without burdening wireless traffic by requiring wireless communications from individual wireless user devices; wherein said NAB manager is configured to receive user Contact Information Discovery queries from individuals via wireless user devices and to transmit said information based on user authorization, and wherein said NAB manager is configured such that in response to such queries from wireless user devices Contact Information is transmitted from one NAB to another NAB based on said user authorization via a wireline connection; further including said NAB manager being configured to provide a plurality of levels of settings governing how much information is transmitted from said one NAB to said another NAB based on the user selecting certain of said settings so as to designate how much information the user wants to share with other users, said levels of settings governing how much information is transmitted from said one NAB to said another NAB including personal information and business information settings; further including said NAB manager being configured to provide selective synchronization between a Network Address Book of a user stored in the core network and a Local Address Book (LAB) in a user device of the user such that the NAB Manager will transmit only certain fields or portions of content information data contained within the user's NAB to the LAB in the user device for which a user selection has been received in order to accommodate limited storage capacity of the LAB; and where said NAB manager is configured to store information within a user's NAB related to the location of the user and wherein said NAB manager is configured to enforce user policies based on the location of the user, including denying contact from a specified user based on a location policy.