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Not many entrepreneurs have a motor like Kevin Ryan's. Kevin is best known for his work as CEO at the on-line advertising firm DoubleClick, which he grew from a 20 person start-up to the largest Internet company in New York at the height of the dot-com boom. After escaping the ensuing bust in an arguably improved strategic position, the company has since changed hands twice. In June 2005, the company was sold to the private equity firm of Hellman and Friedman for $1.1 billion and has made headlines yet again with its recent acquisition by Google for an astonishing $3.1 billion. Yet, this success has not slowed Kevin one bit. Since departing DoubleClick, he has already launched three start-ups, with plans for a fourth this summer. Listen in, as Kevin describes his DoubleClick experiences in both boom and bust, outlines his new start-ups, and explains why now is as good a time as ever to start a company, especially in the Big Apple.