In an attractional model of ministry we try to coax people into our sanctuaries (otherwise known as the "bait-n-switch"). Many churches work very hard and invest enormous resources in this method at Christmas and Easter. In a missional model we seek to be individuals and communities who represent Christ while engaging in and serving the world. The sanctuary and the Sunday morning service become secondary to the service we can be to those outside the church walls.
For those who read "Taking the Plastic Christ out of Christmas" and found yourself agreeing, I think you'll really like this Christmas message. It's a healthy but cynical look at the attractional model.