The development of Agile Project Management is an idea who's time has come. The migration from principles to practices is the next step. This transition likely involves more discussion about how to identify these practices, segregate them across business domains, and adapt to the feedback from their actual use. My experience in engaging in the development of project management practices and putting them to work (executing them on projects), there is a paragraph that has served me well:
You cannot have an execution culture without robust dialog - one that brings reality to the surface through openness, candor, and informality.
Intense debate brings up all sides of an issue, even if it makes people uncomfortable.
... from Execution: The Discipline of Getting Things Done, Larry Bossidy.