2. A method comprising: under control of one or more computer systems configured with specific executable instructions, determining one or more items that are related to a particular item within an electronic catalog; determining tags that are associated with the one or more related items; assigning weights to the tags that are associated with the one or more related items based at least in part on whether each of the tags was already associated with the particular item; ranking the tags that are associated with the one or more related items based at least in part on the assigned weights; and suggesting that one or more of the tags associated with the one or more related items be associated with the particular item based at least in part on the rankings of the tags.
2. A method comprising: under control of one or more computer systems configured with specific executable instructions, determining one or more items that are related to a particular item within an electronic catalog; determining tags that are associated with the one or more related items; assigning weights to the tags that are associated with the one or more related items based at least in part on whether each of the tags was already associated with the particular item; ranking the tags that are associated with the one or more related items based at least in part on the assigned weights; and suggesting that one or more of the tags associated with the one or more related items be associated with the particular item based at least in part on the rankings of the tags. 4. A method as recited in claim 2 , wherein the tags that are associated with the one or more related items have been associated by users of a merchant web site.