Jerod at ChurchJuice.com has some great visual examples on how to create a good looking Facebook page for your church:
One of the biggest changes Facebook has made in recent memory is the switch to Timeline. With that came the ability to upload a cover photo that displays across the top of your Facebook Page. This large, central picture is sure to make a strong first impression to your Facebook friends. Yet, some churches aren’t utilizing that space the best they can.