Talking of the immaterial flows of energy and signals and talking of visualization:
We have some pretty cool colleagues here at AHO.
It makes you think what else you can do by bringing the diagram out into real life world. The project is by Timo Arnall, Jørn Knutsen, Einar Sneve Martinussen
YOUrban weblog: http://yourban.no/2011/02/22/immaterials-light-painting-wifi
Touch weblog: http://www.nearfield.org/2011/02/wifi-light-painting