7. A user-interface system for 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 system comprising: logic for providing access to a set of items; logic for associating an initial relevance weight with each of a plurality of the items of the set; logic for receiving input entered by the user for identifying desired items; logic, responsive to the input entered by the user, for 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 items within the first presentation order is based at least in part on the initial associated relevance weights associated with the items; logic for receiving input entered by the user for browsing through the first presentation order of items and for identifying and selecting the desired items; logic, responsive to a selection by the user of an item, for presenting said item to the user and for adjusting the associated relevance weight of said item; logic for selecting and presenting a subset of items to the user in a second presentation order subsequent to adjusting the associated relevance weight of any of the items, wherein the arrangement of items within the second presentation order is based at least in part on the adjusted associated relevance weights assigned to the items.
7. A user-interface system for 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 system comprising: logic for providing access to a set of items; logic for associating an initial relevance weight with each of a plurality of the items of the set; logic for receiving input entered by the user for identifying desired items; logic, responsive to the input entered by the user, for 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 items within the first presentation order is based at least in part on the initial associated relevance weights associated with the items; logic for receiving input entered by the user for browsing through the first presentation order of items and for identifying and selecting the desired items; logic, responsive to a selection by the user of an item, for presenting said item to the user and for adjusting the associated relevance weight of said item; logic for selecting and presenting a subset of items to the user in a second presentation order subsequent to adjusting the associated relevance weight of any of the items, wherein the arrangement of items within the second presentation order is based at least in part on the adjusted associated relevance weights assigned to the items. 10. The system of claim 7 , further comprising: logic for determining a context in which the user preformed the selection actions, the context including at least one of geographic location of the user, day, date, and time; and logic for associating the contexts of the user selection actions with the corresponding items selected by the user; wherein the logic for selecting and presenting a subset of items to the user in the second presentation order of items includes logic for arranging items within the second presentation order further based on a match between contexts associated with the items and a context in which the subsequent selection and presentation occurs.