Temple Beth Kodesh in Boynton Beach, Fla., has a Facebook page administered by Rabbi Michael Simon.

Southwest Christian Church in East Point, Ga., uses its Facebook page for a variety of things, including evangelization.

Shir Chadash is a Conservative synagogue in the New Orleans area with a Facebook page. Its rabbi, Ethan Linden, has a Twitter account.

Cornerstone Chapel of Leesburg, Va., uses Facebook and Twitter to reach its members throughout the week. Gary Hamrick is senior pastor.

Celebration Metropolitan Community Church in Naples, Fla., uses a MySpace page to connect with members. Lillie Brock is the reverend.

Masjid Abdul Muhsi Khalifah is a Brooklyn, N.Y., mosque with a Facebook page where members discuss everything from World Cup Soccer to current events and religious issues.

Congregation Beth Elohim in Brooklyn, N.Y., has an active Facebook page. Rabbi Andy Bachman is its creator.

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.