A point-of-sale interface receives point-of-sale quantities for a number of individual items, as well as point-of-sale quantity for a miscellaneous group item that includes undifferentiated sales of one or more of the individual items. A determination is then made as to whether the update frequency of each tile exceeds a threshold. An in-doubt list is generated identifying messages that are in-progress of being delivered form the message store to the destination queue by the message threads. The spherical connection terminal is connected to said connection portion. More specifically, methods and systems for allowing individuals to post an invitation to for a meeting on an on-line network and for allowing one or more other individuals to accept such invitation.