What is important is to understand the "Medium is the message" thing as applied to the Internet.

If you ask yourself.. Why did the invention of the press lead to linear man .. you start seeing how linear structures and behaviors had more chances of survival in a world where the communication medium was linear. As an example think of building non-linear course material in the 70s (remember programmed instructions). Very hard to to on a linear/sequential communication medium. Another example is the difficulty non-linear people had to adapt to schools curriculum.

Once the underlying predominant communication medium changes to a network/nodal mode it becomes more efficient to act in a network/nodal way.

Organizations are still thinking in terms of how to take advantage of the new internet technologies. They are missing the big picture. The medium is the message. Build your solutions (command structures/business models/performance appraisals/traning/etc) in a nodal way and you will maximize response times and efficiency. Match the impedances of the systems.

Wirearchy is a nice concept. I like it.