Friendster for the physical world?

A slight hiatus in posts due to moving house and returning to work from maternity leave...

Anyway, this is based on research ongoing in MIT-- by looking at location, communication and proximity patterns the phone can figure out where you go, who you speak to and who you hang round with. based on this information, the phone can configure itself to enable certain functionality (e.g. make alarm clock available through one-button click). Another use of the information would be to work out where you go regularly and link with other people who also go there regularly-- analogous to something like Friendster except acting in the physical world. this would need to be mediated in some way to allay privacy concerns. and ward off nutters.