To continue a theme... actually watching this video a few months ago got my wheels turning on this whole thing. Here is Francis Chan, from 2009, asking his own congregation "is this really church?" The premise is that if you were stranded on a desert island with only the Bible and no other religious influence and you were inspired to start a church, would it look like the church you presently attend?
This is a long video so I recommend letting it load before watching. After the opening video spot, skip ahead to the 22 minute mark where the sermon really begins.