Here is a thought from Dan Kimball, pastor of Vintage Faith in Santa Cruz, CA. His thoughts have always challenged me and I am sure would challenge you as well. He has just recently come out with a new book called "They Like Jesus but Not the Church: Insights from Emerging Generations." I have not read this book yet, but it is one of my next on my list of must reads. His thoughts can be found at his blog site: http://www.dankimball.com/.
"...are we in the Christian bubble and not taking the words of Jesus seriously where He specifically prayed we aren't removed from the world and the people (John 17:15-18). It seems we can slip into being salt and light to each other in our bubbles, but not to those living in our own communities all around us outside the church." -- Dan Kimball
What a great thought. We can get so immersed in our Christian communities that we don't even know ONE non-Christian. There are probably a ton of pastors in this country that do not have an ongoing relationship with anyone who is not a Christian, the very people we are called (and payed) to serve and witness to.