God has no plan B. His announcement of the resurrection of Christ to the world is delegated to those who are witnesses to the resurrection. That is God's plan A for communication of the greatest news ever since the creation of the world itself. In a sense the church is simply the tradition continuing in which Mary meets the risen Jesus and tells Peter and John, and they tell the others and ... by God's grace Christians today also meet the risen Jesus and become witnesses to the resurrection.
We can make church too complicated (and I can do that as well as anyone!). But the church's essential function is to witness the resurrection.
How are we doing in 2010?