PSP 2 a, which is advantageously a network server with supporting structure, may have associated with it a number of other PADs 1 b, 1 c etc., and other PSPs 2 b, 2 c with their associated PADs may also form part of the system. [0051] Each PSP 2 can be an existing Internet service provider (e.g. AOL, MSN, or an internal facility established by a business entity or other institution) or a new entit