J.J. Adler directed the 2007 documentary Unattached, about single Orthodox Jews in New York City. Watch the trailer.

Advance USA promotes Judeo-Christian religious values. It is based in Independence, Mo., and maintains a Washington, D.C. office.

The Unitarian Universalist Association of Congregations works to connect individual congregations with others across the U.S. Contact the executive assistant for the office of the president, Stephanie Carey Maron.

Neil Clark Warren, a psychologist and former dean at Fuller Theological Seminary, co-founded and chairs the eHarmony online dating service. He has written several books about relationships, including Date … or Soul Mate?: How to Know if Someone Is Worth Pursuing in Two Dates or Less.

Christian Piatt is the co-author of MySpace to Sacred Space: God for a New Generation (2007) along with his wife Rev. Amy Piatt. He is an author, editor, speaker, musician and spoken word artist. He co-founded Milagro Christian Church in Pueblo, Colorado with his wife in 2004. Contact through the form on his website.

May Vanderbilt of San Francisco is a co-author of the Good Girl line of novels, including the 2007 title The Book of Jane, about single Christian women navigating modern life.

The International Association of Chiefs of Police is a professional organization of law enforcement personnel that works to confront new challenges in policing and promote member success. Contact Sarah Guy, the manager of legislative and media affairs.

Trish Ryan, who lives outside Cambridge, Mass., wrote He Loves Me, He Loves Me Not: A Memoir of Finding Faith, Hope and Happily Ever After (2008).

Ethan Nichtern is the author of One City: A Declaration of Interdependence (2007), a Buddhist political treatise about, among other things, youth and political activism in a post 9-11 world. He is the founder of the Interdependence Project in New York City.