Nice article: Agile Top-Down

"There's a recent thread on the Scrum list about how an executive or highly-placed manager could get Agile going. I've been one of  those guys, and I know a bit about Agile, and here's how I'd proceed. First, focus management attention on cyclic delivery of running tested software. Second, provide the resources to learn how to do that."
 http://www.xprogramming.com/xpmag/AgileTopDown.htm

Ron Jeffries

If you a manager in the right place - you can probably do these things in your company.