Triple X Church provides excellent informational resources, protective web filters, and online support groups.
Heart to Heart Counseling in Colorado Springs offers intensives, phone groups, and informational resources.
The Student Outreach offers resources specifically for churches and young adults in teaching and understanding sexuality.
Harvest USA is a Philadelphia based ministry that offers seminars, groups, and help for those struggling with sexual addiction.
Fight The New Drug provides a great summary of research explaining how porn affects the brain, relationships, and society. Very helpful for initially developing an understanding of how and why porn is harmful.