Sybil W. Coleman is a professor of social work at Gordon College in Wenham, Mass., and co-author of a 2009 study, “Pulling Off the Mask: The Impact of Social Networking Activities on Evangelical Christian College Students.”

Helen Berger is a retired professor emerita of sociology at West Chester University in West Chester, Pa. She is an expert on the neo-pagan community and has written about how teen witches in the U.S. and Australia use the Internet.

Bryan Auday is a professor of psychology at Gordon College in Wenham, Mass., and co-author of a 2009 study, “Pulling Off the Mask: The Impact of Social Networking Activities on Evangelical Christian College Students.”

PaganSpace.net is a social networking site for followers of Earth-based religions, such as Wicca, Asatru, druidism and goddess-based faiths.

Naseeb is an Islamic social networking site that emphasizes relationships.

Muxlim is a general Islamic social networking site that includes religion, politics, popular culture and relationships.

Muslimsocial.com is a general Islamic social networking site. It provides a forum for online dating, and helps Muslims connect, and reconnect, with other Muslims.

PeaceNext is the social networking site of the Council for a Parliament of the World’s Religions.

Beliefnet’s Community is the social networking area of the largest interfaith website.