1. A method comprising: providing a document that includes a navigational tool configured to permit navigation among hierarchical categories of products, the navigational tool presenting a first set of sub-categories each corresponding to a different cluster of products; identifying unstructured text of one or more consumer-submitted comments in a document associated with a first product; identifying, in the unstructured text of the one or more consumer-submitted comments, a reference to a second product different from the first product; determining one or more relationships between the first product and the second product based on content of the unstructured text of the one or more consumer-submitted comments; in response to determining the one or more relationships between the first product and the second product, including the first product and the second product in a cluster of related products; in response to determining the one or more relationships between the first product and the second product, changing the first set of sub-categories to generate a second set of sub-categories different from the first set of sub-categories, the second set of sub-categories comprising a sub-category that corresponds to the cluster that includes the first product and the second product; and after changing the first set of sub-categories, providing the document that includes the navigational tool such that the navigational tool presents the second set of sub-categories, wherein each of the above are performed by one or more processing devices.
1. A method comprising: providing a document that includes a navigational tool configured to permit navigation among hierarchical categories of products, the navigational tool presenting a first set of sub-categories each corresponding to a different cluster of products; identifying unstructured text of one or more consumer-submitted comments in a document associated with a first product; identifying, in the unstructured text of the one or more consumer-submitted comments, a reference to a second product different from the first product; determining one or more relationships between the first product and the second product based on content of the unstructured text of the one or more consumer-submitted comments; in response to determining the one or more relationships between the first product and the second product, including the first product and the second product in a cluster of related products; in response to determining the one or more relationships between the first product and the second product, changing the first set of sub-categories to generate a second set of sub-categories different from the first set of sub-categories, the second set of sub-categories comprising a sub-category that corresponds to the cluster that includes the first product and the second product; and after changing the first set of sub-categories, providing the document that includes the navigational tool such that the navigational tool presents the second set of sub-categories, wherein each of the above are performed by one or more processing devices. 2. The method of claim 1 , further comprising adding a hyperlink to the identified reference to the second product in the unstructured text of the one or more consumer-submitted comments, the hyperlink providing access to information associated with the second product.