The Islamic Society of North America has invited former U.S. President Jimmy Carter to be a guest and keynote at it's 51st annual convention this month. The nation's largest Islamic convention is titled Generations Rise: Elevating Muslim American Culture
You'll want to watch the promotional video (say, is that Jim Wallis' photo?):
Past ISNA keynote speakers include Rick Warren in 2009 and President Obama last year.
Of special interest this year is the "interfaith dialogue" sessions. Looks like President Obama's special assistant Melissa Rogers is heading that up. Interfaith partners include:
Sojourners United States Conference of Catholic Bishops United Methodist Church Presbyterian Church (U.S.A.) National Council of Churches of Christ in the USA Evangelical Lutheran Church in America Episcopal Church American Baptist Churches USA Cooperative Baptist Fellowship