I think, the Facebook stocks down is not so tragic. Zuck well know what is real price of Facebook stocks and can take a bull strategy. And if it, this terrible falling is not so terrible for Zuck. It just my point of view, but it have some chance to be a real picture.

I'm agree with many hn's that mobile is a general way for today Facebook. But today main Zuck plan look like a only increasing ads on Facebook - I'm talking about new Promote button - http://www.socialbakers.com/blog/587-get-ready-4-new-faceboo... Let me be honest - I'm not undersand Zuck. He have long war with Google for search traffic but still not released a Facebook Search. He can build a many new sections with new features (with ad) but still not. Well, he can experience with new brand pages (bild a new guidline and start migrate website inside Facebook and host it) or choose a absolutley new way of monetization (they are obvious) but this all still do not. I think, Zuck must hire a new CEO and calm down, then stocks can grow up to $160-$220 and more.