From my understanding, Martin Luther wanted to focus people's faith on the grace and Word of God, instead of the priest as the go between. His 95 theses centered on three main points: man is justified by faith alone, every man has direct access to God, and the Bible is the sole authority. You can hear these tenets in the hymn assigned. Why then, with these isolationist ideas, did the Protestants feel compelled to create churches? If man is justified by faith alone, why does he meet with others of his faith?
This is where Luther and PLN's come parallel. Even though the Protestants believed these tenets, they knew man must have a society. Salvation may be between man and God, but man needs one another to keep the faith. I believe the same idea applies with digital media. In most instances (such as now), people sit alone, writing on blogs, hoping for a communication of sorts. Hopefully they receive this communication, but this digital revolution, like the Protestant Reformation, has not completely destroyed the need for society. I can communicate with Mozambicans through Facebook and Skype, but I also have a network of friends here with whom I have dinner and laughs. It is all about balancing the ideas of the past (church and community) with the Reformations and Revolutions of today (individual salvation and digital communication).