Agile Methods in System Administration?

sta asks: "Agile methodologies focusing on development techniques and approaches abound, many of which at the very least give food for thought. I have been in constant discussion with our dev manager about agile approaches and their extension to the systems administration world. Can agile methods and the agile mind set be applied to the systems administration world? Does systems administration rely on policy and procedure for it's integrity and reliability or is that just an ingrained habit? There appear to be a number of administrative tools that claim agility but are there any established agile methodologies?"