More than $27 million in federal grants intended to revitalize New York’s downtown district were announced yesterday. Among the organizations benefitting from the new influx of cash will be the New Museum of Contemporary Art, the Flea Theater and the National Museum of the American Indian. “Some downtown arts groups have repeatedly expressed frustration over the time it has taken for the development corporation to make good on its 2002 pledge to help cultural institutions downtown. Yesterday, their leaders just sounded grateful.”