1. A method of establishing a connection between two individuals using an interpersonal spacetime interaction system, comprising: (a) enabling a first user (1) to specify a spacetime event wherein a spacetime event comprising a subset of spacetime, the specification of which includes a spatial portion and a temporal portion, and (2) to provide annotations for the spacetime event; (b) maintaining a spacetime database comprising data objects, each data object corresponding to a spacetime event, including (1) the specification of the spacetime event, (2) a designation of an owner of the data object, and (3) the annotations for the spacetime event; (c) querying a spacetime database, using a query that includes at least a specification of a desired spacetime event, said query being initiated by a second user; (d) retrieving information from those data objects in the spacetime database whose corresponding spacetime events are proximate to the desired spacetime event; and (e) providing the retrieved information to the second user.