Who Wants to Be a Billionaire?Does your idea of success include more than 6 zeros? Entrepreneurs who have reached the pinnacle of financial success reveal how you can develop the "billionaire mind-set."

Back in the '90s, the big goal for many entrepreneurs was to earn a million dollars. A million meant you had made it--you were not only thriving, you were rich. Alas, being a millionaire now just doesn't have the same cachet. To reach the same level of prestige now, you need to be a billionaire. Once, that might have been a far-fetched dream for entrepreneurs. But today, it isn't only global corporate kings who can luxuriate in such wealth and lead billion-dollar enterprises. Entrepreneurs are creating and running some of these wildly successful companies, too. You'll meet two of them--Marc Ecko and David Hitz--in the following pages.

Marc Ecko once said he hoped people would think of him as Willy Wonka. It's easy to see why, because Ecko brings a sense of edgy wonder to his work. As chief creative officer of Marc Ecko Enterprises and co-founder with his twin sister, Marci Tapper, 35, and business partner Seth Gerszberg, 36, Ecko presides over an empire of clothing and accessory lines, such as Ecko Unltd. and Zoo York, as well as a video game and multimedia division and a magazine.