Think of an open social network as similar to a public square. This is a place where everyone—member, non-member, affiliated, unaffiliated—can gather together. In contrast, a private social network—frequently called a “walled garden”—is only made available to authorized individuals. Both types serve beneficial purposes.
This paper focuses on such aspects of Facebook as:

Breaking Through Growth Barriers In New Churches
Scheduling Solutions Made Easier for Churches
Are There Gaps in Your Criminal Background Check?
Safety 101: A Church Leader's Guide to Risk Management
Leadership Development: An Age-Old Challenge with a Modern-Day Twist
Guidelines for Ministry Workers
Going Outside the Church Walls
Safety 101: A Church Leader's Guide to Risk Management
Planning for Big Success with Small Groups
Preparing for the Unthinkable: Violence in the Church
Not Who You Think They Are: The Real Story of People Who Attend America’s Megachurches
Selecting Locations For Additional Campuses
Why Facebook and Other Social Networks May Not Work for Your Church
Breaking Down the Age Barriers: How Churches Become Intentionally Intergenerational
Changing Metrics: The Benefits of Measuring Devotion and Obedience, Not Just Numbers
Changes in American Megachurches
2010 Large Church Economic Outlook Report: North American Megachurches Are Holding Steady During the "Great Recession"
Brave New Women
Inside The World Of Executive Pastors: Leadership Network's 2009 Survey
MissionInsite Tools Assist Local Church During a Recent Disaster