(Disclaimer: All this is more of looking the "Profesional" opinion about if something like this is possible rather than a suggestion. Although if you find the idea appealing feel free to do it :D)
OK i suddenly have a punch of inspiration while looking at a Minecraft Map, You know how the map updates in real time whenever you move right? Well i had this idea for a advanced eu reader that would be able to read the numbers of Packets and all that other info that the regular reader isnt capable of telling (Either Real time or after X Secs to make it less CPU Intensive), When you click on a cable (Specifically the one that is connected near the machine/storage unit/etc), show something like this:
Also Possibly Show the EU/Packet Resistance of the cable and any other possible info like distance between each machine and the particular cable, how much of each type of cable is connected, etc
And if you target a Machine it would show different information according to the machine (Although this its just optional)
Of course this is just theorical, my lazy ass hasnt been in the mood to play around with Minecraft code and such so i dont know how much of this is actually possible to do (Hence the disclaimer at the start)
Recipe: No idea actually, Something involving a Eu Reader + Advanced Circuit + Something else would be ideal.