15. The computer storage medium of claim 9 , wherein at least one of the nested ranking rules includes a multiplier value that is multiplied against one or more of: a maximum rank value minus a minimum rank value; a rank value minus the minimum value; an average rank value; and a standard deviation of the rank value.
9. A computer storage medium having computer-executable instructions for re-ranking search results, comprising: receiving search results that are ranked; computing statistics based on rank values of a portion of the search results, wherein the portion comprises a plurality of the search results; applying an expression that comprises nested ranking rules defined by a user-input to the search results that re-ranks the search results, wherein at least one of the nested ranking rules includes user-input specified parameters that influence how a result within the search results is re-ranked using the statistics and at least one of the nested ranking rules includes a multiplier value that is multiplied against at least one of: a maximum rank value of the rank values minus a minimum rank value of the rank values; a rank value of the rank values minus the minimum value of the rank values; an average rank value of the rank values; and a standard deviation of the rank values; and after applying the expression to the search results, displaying the search results.