I have really appreciated Michael Frost and Alan Hirsch who have co-wrote and individually wrote a few books worth your perusal. The Shaping, ReJesus, Forgotten, & Exiles. Check out Frost's defintion of "missional below."
Oh yes, that good old buzzward, "missional." I have interestingly enough found a strang dictohomy within my church. We are a moderate/progressive (and liberal at times) church as far as theological thought and intent, but still very ecclesiologically conversative. What I mean is that much of our thought and life is very experientially driven and the theology that backs it is experientially driven (liberationist, feminist, activist, progressivist theology). So we are progressive in thought about how we read Scripture, view women, gays, etc. But, we still "do" church. Church is still the building that we come to and church is what we do when we're together.
I'm not assigning positive or negative remarks about this, because honestly I'm not sure if they are there to be assigned. I am though pointing out that where our theology has been and is traditionally experientially base, that experience has not lead the congregation away from an attractional, business like institution to a more missional institution.
Yet, I feel that the experience is leading us toward an inkling, a desire for something new and that something I believe will be a reorganization, restructuring, and reformation around mission.