This article discusses how schools and school districts across the U.S. face a growing "leadership deficit." Accelerating retirements and reportedly shallow pools of applicants for administrative positions are raising alarms about future leadership. And all of this is happening just when schools will need the best leaders ever. Four years ago, Maine stepped up to this challenge in a novel way. The state's teacher and administrator associations, business leaders, and university system joined together to support the creation of the Maine School Leadership Network (MSLN). The program combines individual coaching, reflection on practice, and a "community of learners" network to support the efforts of principals and teacher leaders to develop effective and sustainable leadership for Maine's schools. (Contains 12 endnotes.)