Ask HN: How would you rebuild Facebook?

If Zuck would have tried to build what now is Facebook he would never have launched, so I would keep it simple, using the tech I already know like he did.

Highscalability.com have some articles about Facebook's architecture here: http://highscalability.com/blog/category/facebook

I would go with something similar to the Diaspora Project: descentralized social network.

I’m building http://sublevel.net using Django. I’m making sure everything is as simple as possible from code to UI to API.