Craig Strickland is senior pastor of Hope Presbyterian Church in Cordova, Tenn., which bills itself as a “church for the unchurched” and relies on social networking sites such as Facebook and Twitter to provide a sense of community.

Martin L. Cook is the Adm. James B. Stockdale Professor of Professional Military Ethics at the U.S. Naval War College in Newport, R.I.

Terry Ledbetter is pastor of NorthStar Church in Saltillo, Miss., which held a series of 2008 sermons on the subject of Facebook.

Kathleen Carley is a professor of organizational sociology at Carnegie Mellon University in Pittsburgh. Among her areas of study is the use of social networks

Glenn Shuck is an assistant professor in the religion department at Williams College in Williamstown, Mass. He has said that the trend of tweeting and using other social networks during religious services is likely to grow, especially among emerging churches.

The Rev. Nathan D. March created a social network site for Prince of Peace Catholic High School Youth Ministry of Lewiston, Maine, using Ning.com.

Stephen Shields is the founder of FaithMaps. He freelances for Leadership Network, where he wrote a guide (enter “social networking” in the Keywords field) to online social networks for churches.

Jeremiah Owyang is an industry analyst at the Altimeter Group in Silicon Valley and a columnist for Forbes CMO Network. He has blogged about social network statistics and can discuss how to interpret them.

Helen Osman is secretary of communications for the United States Conference of Catholic Bishops and can discuss the conference’s guidelines on use of social networks among Catholics. Contact [email protected].