I must admit, this looks great. There seems to be a couple of design choices that are a bit weird that have been mentioned below, but it's a solid bit of work.

I must admit, this looks great. There seems to be a couple of design choices that are a bit weird that have been mentioned below, but it's a solid bit of work. But Facebook, why are you still cursing the world with your terrible main applications and spending precious development hours making additional apps? If you ever want to monetize mobile you need to make the mobile experience not terrible. Take the team working on this, give them the main app, give them 3 months and let them go nuts. It'll work. It'll be great. Your users will want to engage more.