1. A user-interface method of selecting and 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 a set of items, each item having an associated relevance weight on a per user basis to indicate a relative measure of a likelihood that the item is desired by the user; providing an initial associated relevance weight to each item; 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 as a navigable topology of items wherein the items are ordered at least in part by the initial associated relevance weights assigned to the items; receiving input entered by the user for navigating through the topology of the subset 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; in response to receiving subsequent input entered by the user, selecting and presenting a subset of items to the user wherein the items are ordered at least in part by the adjusted associated relevance weights assigned to the items such that items with greater associated relevance weights are presented as more relevant items.