The official Facebook for Android app is undoubtedly the best way to view Facebook on your Android, but that's hardly saying much. The free app is limited, but simple to operate. You can update your status from the app and read your newsfeed; take and upload a photo; and comment and like a status message.
A long press on a status message gets you quick links to view a contact's wall message and see user info, but you're unable to do much more--like see pictures and access invites and birthday reminders--without going to Facebook's mobile Web page. Compared to the app's iPhone cousin, Facebook for Android has a long way to go, though it's more than adequate for updates and straightforward interaction.