1. A method for enabling a search against an information source deemed to be an expert in a category of interest, comprising: accessing results of searches performed by at least one search engine; determining, among the accessed results, a set of results provided by a particular information source; identifying a category of interest; determining a set of results that are related to the identified category of interest and that also are provided by the particular information source; determining a first ratio of the accessed results provided by the particular information source to the accessed results provided by other information sources; determining a second ratio of search results that are related to the identified category and provided by the particular information source to search results that are related to the identified category and provided by other information sources; identifying the particular information source as an expert information source for the category of interest by comparing the first ratio and the second ratio; receiving a query; determining that the query is associated with the category of interest; and selecting the particular information source for satisfaction of the query based on the identification of the particular information source as an expert information source for the category of interest and based on the determination that the query is associated with the category of interest.