I dont know if this is possible with the current state of the api, but id like to see a node group for nodes that i want to be kept in active memory. this would make my powerlines (and probably mesecon circuits too) work properly over long distances.
As it stands, i flick a switch on one of my long circuits, and at the chunks edge the lines "break" (part on, part off) because circuit_activate() has to stop at name=='ignore' - im thinking of making circuits catch fire at those "breakpoints" in the meantime :-)