A method of obtaining lists of nodes of a multi-dimensional personal
information network includes accessing personal information aggregators
from a first set of personal information aggregators that correspond to
nodes of the multi-dimensional personal information network that have a
degree of separation of one from a first node. One or more lists of
additional personal information aggregators that correspond to nodes that
have a degree of separation of one with at least one node corresponding
to a personal information aggregator in the first set of personal
information aggregators are requested. One or more of the requested lists
are received and stored.