Facebook Home has already been leaked. It was meant to be officially released via the Play Store this Friday 12 April 2013.
Download it here
Consists of three APKs
1. com.facebook.katana.apk - Main Facebook
2. com.facebook.orca.apk - Messenger/SMS
3. com.facebook.home.apk - Home Launcher
Uninstall your current facebook and install all the three APK. Enjoy integrated Facebook on your phone.
2. Login to Facebook Messenger
3. Facebook home is a launcher to replace TWLauncher. Press Home button to select launcher.
Suitable for phone with screen resolution of 1280 x 768. Our Galaxy Note N7000 have 1280 X 800. It's more than enough :)