The Sister Rose Thering Endowment for Jewish Studies at Seton Hall University in New Jersey is a good source for scholars and veterans in Jewish-Christian dialogue from both communities

The International Council of Christians and Jews serves as the umbrella organization of 38 national Jewish-Christian dialogue organizations worldwide. The North American branch of the organization is the Council of Centers on Jewish-Christian Relations, which lists more than two dozen affiliated centers and institutes around the country with access to dozens of scholars and experts.

The Alban Institute in Herndon, Va., provides data and expert commentators on congregational and clergy dynamics.

Interfaith Voices for Peace and Justice allows you to search for groups by state.

The North American Interfaith Network lists many local, regional and national groups and other interfaith databases.

Tanenbaum is a secular organization for interreligious dialogue and education.