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; identifying the particular information source as an expert information source for the category of interest based on the set of results determined as being provided by the particular information source and the set of results determined to be related to the identified category of interest; 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.