Mark Cuban's Layers of Facebook Friendship might be a way to define Friendship in a Social Network - here's what he said in a post titled My New Facebook Strategy and the FB Power Level:
"…The first layer has my real friends. Those people who who I have actually met in real life and who I enjoy keeping in touch with. FB provides a great way to keep up with things with them via pictures, notifications, etc.
The 2nd layer is people who I have tangential connections to. They may just live in Dallas Fort Worth. They may be self proclaimed Mavs or MMA or movie fans, or in groups I'm in. For whatever reason there is something about them that I could connect to.
The 3rd layer is emerging as a very unique and interesting network in FB. Its what I will call "The Power Layer." These are people who in whatever industry they are in , retain some level of power. Having them as FB friends, although very simple and non committal, gives me some level of access to them, and them to me. These are people that if they sent me a FB mail, i would certainly read and respond to , and I think they would do the same.
Its what I could also call the one shot layer. If you have an idea or thought, you get 1 shot, per year to get their attention. Anything more than that probably could and would get me deleted. Everyone at this layer gets pitched continuously. Myself included. If you abuse it, you lose it. "
Now, we just need a simple Facebook app (if it doesn't already exist - who knows, maybe it does) that helps us classify each friend in one of the three categories.
