I really like the approach! In our last assignments we also focused on relationships and I for one think social media is changing how we see relationships and interact with people we know. In a network of 50 friends you of course need to make decisions that can be unpleasant for some of your friends that didn't make the cut, but those 50 people really matter to you and you also share very private moments with them, because they are not just some acquaintances.
Here is a short article about the network from Wired.
What do you guys think, how will relationships evolve further in social media? Would you be able to limit your friends to 50 people?