To follow up on the last week's post, here're a few select quotes from a recent article at Knowledge @ Wharton:
"Advertising has begun to seep into churches, and the phenomenon shows no signs of slowing down, say academic, religious and marketing experts. Some advertisers are taking the next step: marketing products -- like an SUV -- with no intrinsic religious value through church networks. Churches offer offer a particularly tantalizing opportunity for those intent on network or "word-of-mouth" marketing."
See some data on megachurches from Hartford Institute for Religion Research, and a list of megachurches by state.