If you didn't know already, Facebook are having a press conference tomorrow which they titled as "Facebook's home on Android". No one's 100% sure what this means but it either means they'll be announcing a Facebook phone or the Android OS heavily customised with Facebook integration.
9to5Google have acquired screenshots/press shots of what this Facebook phone or Facebook Android OS might look like - of course all of these shots could be completely made up. But from first impressions it looks the real deal and actually looks nice.
From the screenshot on the right, it looks like they might either be your homescreen or lockscreen. It seems to show notifications across the screen like iOS.
We'll see what Facebook actually have in store for us tomorrow, but this may be what they're revealing.