As I noted in the article's comments, I'm pretty sure you can't just add "dataType:jsonp" and have it automagically bypass all the cross-domain security restric

As I noted in the article's comments, I'm pretty sure you can't just add "dataType:jsonp" and have it automagically bypass all the cross-domain security restrictions. What actually happens is jQuery appends something like "callback=some_random_function" to the end of the querystring when it makes the request, and then the server is supposed to return you the standard data, wrapped in a function definition with the same name. jQuery then automatically executes the function, making the json data available. Some servers require a specific function name, which can be specified as an ajax option using "jsonpCallback: functionName". All this effectively does is uses a specific function name instead of a randomly generated one, so that it matches up with the function returned from the server in the response.