Unless you are accessing it via a mobile network.
Read more here.
So many poor people being deprived of opportunities to chat with friends online, to play Farmville, or to just tell the whole world their location at this exact moment. (I often get envious when I read those....often these people are posting from some fantastic restaurant and going out for dinner happens very rarely here).
Some of the comments are funny. I can't believe there are so many people sounding so angry about this. It's like they are suffering drug withdrawal symptoms.
Come on, everyone, lighten up. Call your friend on the phone. Go to their place and see them if they're local. We all survived for a very long time without Facebook before Mark Zuckerberg invented it.