marry me sophie calle

For  my newest and lastest project, thanks to a trip to the tate modern's new exhibition, i have been looking at artists who construct and archive personal mythologies. Sophie Calle does this through objects and artifacts/nostalgic memorabilia which belong to her or those she has found. One piece I particularly like is a pre-Amelie project she did for a newspaper in which Calle found a man's address book and then spent a month calling everyone in it besides the owner himself to get to know him. Based on the character she discovered (as seen above), she likes him. This is fascinating on many levels, first of which is the dated basis of the investigation: the address book. What is the contemporary equivalent? Facebook password? Cell phone via mass text? Could all of your facebook friends help a  stranger find out about your deep character and construct a personhood for you? I wonder what is at stake in the individual's identity in these questions. With no hard manifestation of your network, does your self (according to others) become weakened? Its getting existential in here.