11. A computer system comprising: a computer processor; computer memory connected to the computer processor, the computer memory storing a page rank module programmed to: receive a search query from a user; identify one or more result pages that pertain to the search query; determine, for each of the one or more result pages, a raw page ranking; determine a metric of direct evidence of user interest for at least one result page of the one or more result pages by which is a result of a mathematical function which expresses how many users historically have visited the at least one result page subtracted from how many users have recently visited the at least one result page all divided by how many users historically have visited the at least one result page; adjust the raw page ranking of the at least one result page among the one or more result pages based on the metric of direct evidence of user interest for the at least one result page to produce an adjusted page ranking for the at least one result page; and present, as search results, the at least one result page to the user in accordance with the adjusted page ranking; wherein: determine the metric of direct evidence of user interest for the at least one result page by determining a measure of how often users traverse to or from the at least one result page while browsing.
11. A computer system comprising: a computer processor; computer memory connected to the computer processor, the computer memory storing a page rank module programmed to: receive a search query from a user; identify one or more result pages that pertain to the search query; determine, for each of the one or more result pages, a raw page ranking; determine a metric of direct evidence of user interest for at least one result page of the one or more result pages by which is a result of a mathematical function which expresses how many users historically have visited the at least one result page subtracted from how many users have recently visited the at least one result page all divided by how many users historically have visited the at least one result page; adjust the raw page ranking of the at least one result page among the one or more result pages based on the metric of direct evidence of user interest for the at least one result page to produce an adjusted page ranking for the at least one result page; and present, as search results, the at least one result page to the user in accordance with the adjusted page ranking; wherein: determine the metric of direct evidence of user interest for the at least one result page by determining a measure of how often users traverse to or from the at least one result page while browsing. 16. The system of claim 11 , wherein the page rank module is more specifically programmed to: determine the metric of direct evidence of user interest for the at least one result page which is the result of a mathematical function which expresses how many users historically have visited the at least one result page in a predetermined length of time subtracted from how many users have recently visited the at least one result page in the predetermined length of time all divided by how many users historically have visited the at least one result page in the predetermined length of time.