NEW YORK (AdAge.com) -- New York times Op-ed columnist Nicholas Kristof has become an unlikely evangelist for digital games as a new form of journalism. In fact, he's so taken with the idea that he's developing an online game to go with his new book due out in the fall. Authored with his wife, Sheryl WuDunn, it's a serious work about the oppression of third-world women. In this keynote address at the recent Games for Change Festival in Manhattan, Kristof explained how an MTV game had opened his eyes to the true power of that online messaging format as a reporting tool.