I'm just finishing editing my last chapter of my dissertation, which is on Leadership. In my limited survey, there seems to be a lack of material and resources on leadership for emerging culture and organizations. There is plenty of material in the non-christian realm wrestling with emerging contexts however.
One book that impacted me was Jim Collins 'Good to Great', and the accompanying monograph for non profit/non business organizations. It Offers a very different metaphor/model to the CEO model of many leadership materials. You can read a sample here.
Jim Collins has a webs site here.
Have you come across anything on leadership that has been helpful?