Sheryl Sandberg - The elder in Facebook.
Facebook, the social networking giant, founded in a dorm room at Harvard University, is mostly young male software engineers working in a freewheeling culture.
Facebook recently hired Sandberg, former Google executive, to provide some adult supervision and help Silicon Valley's hottest startup to grow up - and make oodles of moola. If anyone can figure out how to capitalize on Web 2.0, it's has to be her. At Google, as vice-president of global online sales and operations, she oversaw huge growth in its international operations and managed its lucrative advertising business. As COO of Facebook, Sandberg will be a big influence on the expanding world of new media users as she scales Facebook operations and build its business model.
