If you're looking to try out Facebook Home on your Android smartphone you'll need to have a "select" Android smartphone. The smartphones that can officially install Facebook Home are the HTC One X, HTC One X+, Samsung Galaxy S3 and the Samsung Galaxy Note 2. If you don't have one of these smartphones and still want to install Facebook Home you can now install it on almost any Android smartphone or tablet.
Paul O'Brien at Modaco has posted the files you'll need to download in order to get Facebook Home up and running on your Android smartphone or tablet. He has patched the Facebook main app (katana), patched Messenger app (orca), and patched Home app.
Download the above apps and transfer them to your Android device. Use your favorite file manager to open and install the patched APK files. Once you've installed all three files you'll need to open the Facebook application and sign in to your account. Once you're logged in you should see a menu button, tap it, go to Settings, check the Enable Facebook Home box. Press your Home button and when prompted select Facebook Home to 'Always' to complete the setup and have Facebook Home as your launcher. You've now got Facebook Home installed.
I can confirm Facebook Home works on an unsupported Verizon Samsung Galaxy Nexus. Cover Feed, Chat Heads, Notifications, and the App Launcher all worked perfectly. Some users are reporting issues when trying to send SMS messages from the Facebook Messenger app. If you can look past that issue and really want to try Facebook Home on an unsupported device it's now possible. It's also just as easy to disable the feature completely in the Settings app of the Facebook app or uninstall it if you decide you do not "Like" Facebook Home.