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:

Planning for Big Success with Small Groups
Safety 101: A Church Leader's Guide to Risk Management
Hire or Freeze? Churches Take Differing Staff Approaches to Keep External Focus
How Secure is Your Children's Ministry
Why Facebook and Other Social Networks May Not Work for Your Church
Planting a New Outreach Ministry
Breaking the 50 Percent Barrier: How to Increase Small Group Participation in Your Church
Leading Outside the Walls: How Externally Focused Churches Engage and Grow Ministry Leaders
Church Facilities Management: The Facts
A New Decade of Megachurches
Avoiding the Money Conflict
Missional Households
The New Role for Western Missionaries
Church Health Survey Report 2010
Church Health Survey Questionnaire
Good to Great Church Planting: Accelerating Growth and Effectiveness in Church Planting
Protecting Your Ministry's Traveler's
Tim Cool of Cool Solutions Group Initiates Facilities Management Contract with Elevation Church Campuses in Charlotte, North Carolina
Changes in American Megachurches
MissionInsite Tools Assist Local Church During a Recent Disaster
Lending Your Church Facilities: Guidelines
Not Who You Think They Are: The Real Story of People Who Attend America’s Megachurches
Making Multisite Mergers Work: New Options for Being One Church in Two or More Locations
Why Facebook and Other Social Networks May Not Work for Your Church
Going Outside the Church Walls