Embedded, coupled, shaped waveguide resonators having conductive walls sandwiched between two fired green tape stacks, said conductive walls having apertures therein whose size and location determine the degree of coupling. Declared extended instant messaging states for destination devices are received, and an enhanced instant message based on declared extended instant messaging states is generated. Examples of such instructions include writing of data units without linking to a queue, re-sequencing of the data units relative to one another without moving the data units in memory, and linking the previously-written data units to a queue. The tip area is characterized by third and fourth sharp edges which are symmetric relative to the plane of symmetry.