The above link is a helpful little article on missional leadership and moving towards being a missional church. What is most interesting to me, however, is the one response to the post.
CS says, "These people may be "highly spiritual," but without God, they are also "highly condemned." We cannot praise their spirituality while overlooking their sin nature."
I seem to remember that in John 3:17 it says, "For God did not send his Son into the world to condemn the world, but that the world should be saved through him."
I'm just not sure we can ever be a missional church if we see someone first as "lost" or "condemned" or "sinful." Maybe the first step in becoming missional is to see the "lost" first and foremost as people loved by God. With that as their primary identity, not some label we attach to them.