function asyncQueue(/* function, function, ... */) {
	var slice = Array.prototype.slice,
		funcs = slice.call(arguments, 0),
		baseArgs = [function() {
			next(arguments);
		}],
		next = function(args) {
			var nextFunc = funcs.shift();
			nextFunc && nextFunc.apply(
				this, baseArgs.concat( slice.call(args, 0) )
			);
		};
	next();
};

// eg...
asyncQueue(function(next) {
	console.log('1');
	setTimeout(next, 1000);
}, function(next) {
	console.log('2');
	setTimeout(next, 1000);
}, function(next) {
	console.log('3');
	setTimeout(next, 1000);
}, function(next) {
	console.log('4');
	setTimeout(next, 1000);
});