This is pretty long but worth at least checking out.
Pacifica radio calls them "one of the great treasures of American culture."
Reverend Billy (subject of the Morgan Spurlock documentary "What would Jesus Buy") was arrested at Disney World, demonstrating, the day after Christmas.
Half joking (but only half), the church preaches the gospel of "stop shopping." They try to save people from "The Shopocolypse."
This is audio of one of their services after a brief interview with one of its leaders.
Program: Pacifica National Special
Playtime: 1 hour 51 minutes 38 seconds
Date: November, 2007