Yesterday Forbes magazine, in their annual ranking of the rich, declared New York City is no longer the billionaire capital of the world. Where have all the dollar signs gone? To Moscow, of course, who beat us out by 3 billionaires (they have 74 to our 71). Most of the big buck city dwellers are familiar names: Mayor Michael Bloomberg ($11.5 billion), publishing powerhouses Samuel Newhouse Jr. and Rupert Murdoch ($8.5 billion and $8.3 billion),......