We’re delighted to announce the semifinalists for the Management 2.0 Challenge . In this first leg of the HBR/McKinsey M-Prize for Management Innovation, we asked the most progressive thinkers and radical doers from every realm of endeavor to share a Story (a real-world case study of a single practice, an initiative, or a broad-based transformation) or a Hack (a disruptive idea, radical fix, or experimental design) that illustrates how the principles and tools of the Web can help to overcome the limits of conventional management and help to create Management 2.0.