You haven't, by any chance, been feeling rich lately, have you? Sort of feeling a little bit smug that the burst of the real-estate bubble won't splatter all over you? At least a little bit excited that in November, your every-other-Friday paycheck will come three times instead of twice? Well, just in time for all that, Forbes has released its annual list of the 400 richest people in America. And guess what? Sixty-four of them are New Yorkers! The top 100 billionaires, in fact, include household (okay, apartment-hold) names like shareholder activist Carl Icahn, Revlon CEO Ron Perelman, designer Ralph Lauren, Condé Nast chairman Si Newhouse oh yeah, and Mayor Bloomberg, who at $11.5 billion is America's 25th richest man. According to Forbes, he more than doubled his wealth from last year, which was enough to leapfrog over rival media magnate Rupert Murdoch in the ranks.