Dennis Levine, 52
Almost two decades after he helped take down arbitrageur Ivan Boesky, Levine is back making deals - albeit smaller than his glory days. The former Drexel investment banker and convicted insider trader is still in New York City, but now he runs a small consulting firm that helps new technology companies grow. And he lectures students about his mistakes. "Back then I screwed up," he says of the crimes that landed him in jail for 15 months. "But I learned more about myself from my adversity than I ever have from my successes."