jsonp

I'm building an iPhone app using JQTouch/JQuery and PhoneGap, and so I was hoping the services module would allow me to pull content via javascript into my iPhone application from Drupal. In theory.

It took me all day to figure out why my calls weren't working with the normal JSON server...because it's cross-domain. Ugh.

So now I'm going to focus on JSONP, which should solve THAT problem. But I can't really find a clear explanation of how to do anything with key authentication in javascript. Or would key authentication even be necessary here? I do want it as secure as possible.