Dean Kamen: Multimillionaire Inventor & Entrepreneur

"When Kamen wanted to erect a wind turbine on North Dumpling and the state of New York objected, he seceded from the US. Though the secession has never been officially recognized, he signed a nonaggression pact with his friend, then-President George Bush, and enlisted Ben Cohen and Jerry Greenfield of Ben & Jerry's as "joint chiefs of ice cream." North Dumpling has its own flag, its own anthem, a one-ship navy, and its own currency. One bill, which Kamen carries in his wallet, is the value of pi. "You can't make change for it," he says with a grin. "It's a transcendental function.""