I found this book to be revelatory and shared it with a number of people. Great read for anyone trying to understand the potential of social media. Full of great ideas for experienced folks as well.
What I enjoyed most about this book was Craig's use of storytelling to make his point about the value of storytelling. Bravo!
Berger does a great job of breaking down the various elements that when working together, create a contagious effect. He then provides a recipe for maximizing the chance that your initiative will be contagious. Super narration and fast listen.