[Update #1] Facebook Home is currently available in the U.S. only and it will be rolled out to other countries later. If you are interested to install Facebook Home, please go to your Google Play store to check periodically or check back to this page for more updates.
[Update #2] 17th April 2013
The Facebook Home app is now available for download in Canada and the UK. Go to your Google Play store to download it now.
Facebook Home, a suite of apps that replaces the homescreen of your Android phone with your Facebook News Feed and overhauls your messaging setup, is now available in the Google Play store.