gistfile1.js

  queue()
    .defer(getJSON,"new-york.json")
    .defer(getJSON,"chicago.json")
    .defer(getJSON,"miami.json")
    .awaitAll(function(error,cities) {
      //Cities will be an array of cities, in order
    });

  function getJSON(url,cb) {
    $.getJSON(url,function(data) {
        cb(null,data);
    });
  }