AppNexus CEO Brian O'Kelley charmingly and candidly describes his entrepreneurial exploits in this talk titled "Three Failures and a (Big) Success: The Evolution of a Startup CEO."From O'Kelley's AppNexus bio: "Brian O'Kelley is best known for creating the first successful online ad exchange as CTO of Right Media (acquired by Yahoo for $850MM in July 2007). Brian's entrepreneurial career began in high school selling computers out of a friend's garage. At Princeton, he started a web design firm, building an open-source e-commerce engine used by more than 100 companies. After graduating in 1999, Brian was CEO of Netamorphosis, an early social networking and e-commerce site for events and venues, and spent time at LogicSpan, Cetova, Poindexter Systems before joining Right Media in 2003.