“We’re an entirely new community of people brought together because we want to share ideas about business. We like business. We think it’s important. Work gives more meaning to our lives. We believe business profoundly helps define our culture.”

and quotes Mark Zuckerberg “A pure social network tries to recreate what Mark Zuckerberg of Facebook calls the “social graph” of a community that already exists.”

This is like asking “Which Came First, The Chicken or The Egg? .

I will just say this :-

FastCompany is a well established brand and has quality readers from 1995, so you don’t have to compare yourself with Facebook or any other social networks and write something like “we are a new community”, you just changed your site design , improved reader registration and trying help members to network with each other, even if you claim you are social network for business that’s  ok you are a great brand. After reading lot of analysis about fastcompany’s recent changes and listening to lot of web strategy experts like me It’s better to do this “Listen to your readers, do what they want you to do in your new website”.