26. The system of claim 12 , wherein each of the two or more of the plurality of contacts has associated therewith a different set of identity tokens or identifiers, wherein each of the two or more of the plurality of contacts corresponds to a different network of which the user is a member, further comprising: comparing a first set of identity tokens or identifiers of a first one of the plurality of contacts with a second set of identity tokens or identifiers of a second one of the plurality of contacts.
26. The system of claim 12 , wherein each of the two or more of the plurality of contacts has associated therewith a different set of identity tokens or identifiers, wherein each of the two or more of the plurality of contacts corresponds to a different network of which the user is a member, further comprising: comparing a first set of identity tokens or identifiers of a first one of the plurality of contacts with a second set of identity tokens or identifiers of a second one of the plurality of contacts. 39. The system of claim 26 , wherein each set of identity tokens or identifiers includes a name or phone number, wherein comparing a first set of identity tokens or identifiers of a first one of the plurality of contacts with a second set of identity tokens or identifiers of a second one of the plurality of contacts comprises: comparing a name or phone number of the first one of the plurality of contacts with a name or phone number of the second one of the plurality of contacts.