Pagan Legalities in America

Hey, does anyone here know where I can find information on the problems that pagan groups have had getting legally recognized as churches, due to differences from traditional christian church structure? I know I've read stuff on it before, but I'm drawing a total blank as to where and searches aren't finding anything relevant. I'm trying to use it as evidence in a debate I'm having in another blog, that using religion as a basis for laws, even in cases where it might seem harmless, ultimately hurts those of other religions.