8. The method of claim 1 , wherein the user request to modify the hierarchy of categories comprises feedback data relating to one or more of the categories, the method further comprising storing the feedback data in connection with a profile, wherein the profile is associated with the user.
1. A method comprising: receiving a search request from a first user; performing a search based on the search request; providing a set of search results; providing a set of categories for organizing the set of search results, wherein each category is identified based, at least in part, on one or more search results; organizing the set of search results into a hierarchy of categories, the hierarchy including at least one category from the set of categories; displaying at least a portion of the hierarchy of categories to the first user; receiving a request from the first user to modify the hierarchy of categories; modifying the hierarchy of categories in accordance with the request from the first user; associating the modified hierarchy of categories with a user profile for the first user; storing the modified hierarchy of categories associated with the first user to provide a customized hierarchy of categories to the first user for use in response to subsequent search requests from the first user; and providing a customized category hierarchy for the first user based on the user profile for the first user in response to a subsequent search request from the first user.