Maybe their BRAND UNVEIL can educate you about why this is the most important thing ever: http://www.blogcdn.com/www.engadget.com/media/2010/04/msft-p...
I find the quotes from their event hilarious: "So, this social generation really does have a point of view. They think it, they do it, and they have a mantra for it." "We came up with this concept of friends, friends, and friends."
Maybe I'm waaay too old to know what "kids these days" are up to, but if everybody under the age of 22 is all about FRIENDS FRIENDS FRIENDS then the world will soon collapse. No new work will get done. We'll be idiocracy within twenty years where everybody exists solely to click ads. It's ads and vapid social media consultants all the way down.
Friends Friends Friends is the new way to network, isn't networking one of the things they preach to everyone for everything (finding a job, starting a startup...)
[1]: Where "social stuff" also means Facebook, Twitter, and email, instead of just text and calling.