29. A computer-implemented method, comprising: determining, by one or more configured computing systems, one or more first categories for a user-defined group of multiple items, the user-defined group being defined by a user that is one of multiple customers of an item ordering service that makes the multiple items available to the multiple customers, at least one of the multiple items being associated with one or more second categories that are not included in the one or more determined first categories; providing, by the one or more configured computing systems, information for display to the user identifying the user-defined group of multiple items as a single item to be ordered, wherein the information, when displayed, indicates an action that is to be performed to order the user-defined group of multiple items from the item ordering service as the single item; and after performance by the user of the indicated action, initiating, by the one or more configured computing systems, an order for the user-defined group of multiple items for the user.
29. A computer-implemented method, comprising: determining, by one or more configured computing systems, one or more first categories for a user-defined group of multiple items, the user-defined group being defined by a user that is one of multiple customers of an item ordering service that makes the multiple items available to the multiple customers, at least one of the multiple items being associated with one or more second categories that are not included in the one or more determined first categories; providing, by the one or more configured computing systems, information for display to the user identifying the user-defined group of multiple items as a single item to be ordered, wherein the information, when displayed, indicates an action that is to be performed to order the user-defined group of multiple items from the item ordering service as the single item; and after performance by the user of the indicated action, initiating, by the one or more configured computing systems, an order for the user-defined group of multiple items for the user. 42. The method of claim 29 further comprising, under control of a client system of the user, displaying the provided information to the user, receiving an indication of the indicated action being performed by the user, and providing an indication to the one or more configured computing systems of the indicated action being performed.