14. A computer-implemented method comprising: performing an analysis of at least one of terms or phrases of searches performed by a plurality of members of a social network to infer interests of the plurality of members; determining, based on the analysis, that a first number of the searches is associated with a first topic of interest, the first number of the searches being performed by a first group of members included in the social network; determining, based on the analysis, that a second number of the searches is associated with a second topic of interest, the second number of the searches being performed by a second group of members included in the social network; receiving a search query from a user; in response to receiving the search query: determining, by a computer, search results responsive to the search query; returning, by the computer, the determined search results; accessing, by the computer, a database of mapping information, wherein the mapping information maps the first group of members included in the social network with the first topic of interest and the second group of members included in the social network with the second topic of interest; forming, by the computer and in the database, a first subnetwork of the social network, the first subnetwork including the first group of members included in the social network; forming, by the computer and in the database, a second subnetwork of the social network, the second subnetwork including the second group of members included in the social network; determining, by the computer, that the search query matches the first topic of interest; and returning, by the computer and at least partly in response to determining that the search query matches the first topic of interest, a link to at least one member of the first subnetwork of the social network.
14. A computer-implemented method comprising: performing an analysis of at least one of terms or phrases of searches performed by a plurality of members of a social network to infer interests of the plurality of members; determining, based on the analysis, that a first number of the searches is associated with a first topic of interest, the first number of the searches being performed by a first group of members included in the social network; determining, based on the analysis, that a second number of the searches is associated with a second topic of interest, the second number of the searches being performed by a second group of members included in the social network; receiving a search query from a user; in response to receiving the search query: determining, by a computer, search results responsive to the search query; returning, by the computer, the determined search results; accessing, by the computer, a database of mapping information, wherein the mapping information maps the first group of members included in the social network with the first topic of interest and the second group of members included in the social network with the second topic of interest; forming, by the computer and in the database, a first subnetwork of the social network, the first subnetwork including the first group of members included in the social network; forming, by the computer and in the database, a second subnetwork of the social network, the second subnetwork including the second group of members included in the social network; determining, by the computer, that the search query matches the first topic of interest; and returning, by the computer and at least partly in response to determining that the search query matches the first topic of interest, a link to at least one member of the first subnetwork of the social network. 18. The method of claim 14 , the social network including a plurality of subnetworks, the method further comprising: determining that at least a subset of the members of the social network are interacting in such a way as to satisfy a threshold of interest with respect to an additional topic of interest; and in response to the threshold of interest being satisfied, automatically forming a new subnetwork of the social network based on the additional topic of interest.