If any one has made Agile understandable to top management, it has been Mary & Tom Poppendieck, whose Lean Software Development series has bridged the gap between understanding how business works and how software development works.
If you are a C-Level executive and your company develops software, this course is for you. (Even if you don't develop software, you will profit tremendously.) You learn how to focus your company on the right problems, so it can learn systematically to produce more value more quickly for your customers, with less waste.
You can now register online for Mary & Tom Poppendieck's Lean Leadership Course. May 25/26. There is special super-early bird pricing if you register before December 31. (You won't get an invoice until 2011, unless you specifically ask for it this year.)