Although Alex did indeed provide a solution to his problem, I found following it a bit difficult. I had an issue similar to his that I solved, and I wanted to share my solution for anyone else who needs to process a variable number of ajax requests.
// Array of requests
var requests = Array();
requests.push($.get('responsePage.php?data=foo'));
requests.push($.get('responsePage.php?data=bar'));
var defer = $.when.apply($, requests);
defer.done(function(){
// This is executed only after every ajax request has been completed
$.each(arguments, function(index, responseData){
// "responseData" will contain an array of response information for each specific request
});
});