1. A user-interface method of presenting a collection of items in which the presentation is ordered at least in part based on navigation and selection behavior of a user learned over time, the method comprising: providing access to a set of items; associating an initial relevance weight with each of a plurality of the items of the set; receiving input entered by the user for identifying desired items; in response to the input entered by the user, selecting and presenting a subset of items to the user in a first presentation order of items browsable by the user wherein the arrangement of the items within the first presentation order is based at least in part on the initial associated relevance weights associated with the items; receiving input entered by the user for browsing through the first presentation order of items and for identifying and selecting the desired items; in response to a selection by the user of an item, presenting said item to the user and adjusting the associated relevance weight of said item; subsequent to adjusting the associated relevance weight of any of the items, selecting and presenting a subset of items to the user in a second presentation order of items browsable by the user wherein the arrangement of the items within the second presentation order is based at least in part on the adjusted associated relevance weights assigned to the items.