Megachurches are horizontally diversifying (i.e., they're becoming megamalls). Moneylenders in the temple, anyone?
Southeast Christian is an example of a new breed of megachurch — a full-service "24/7" sprawling village, which offers many of the conveniences and trappings of secular life wrapped around a spiritual core. It is possible to eat, shop, go to school, bank, work out, scale a rock-climbing wall and pray there, all without leaving the grounds.
These churches are becoming civic in a way unimaginable since the 13th century and its cathedral towns. No longer simply places to worship, they have become part resort, part mall, part extended family and part town square.
(Thanks, Steve!)