What is a network?

Jen from Jen on Friday’s brings up an interesting question, what is a network and when do you know if you belong to one?

Her comments indicate that the network is only there when you know you belong to one. If someone reads your RSS feed does that mean they are in a network with you or is a network only formed when there is cross recognition of both parties? What are the new social norms for these virtual social networks?

Jen has belonged to my knowledge input network for several weeks now, I have been reading her posts and they have been inputs into some of my thoughts, admittedly I am yet to blog about them so little time!