Seperate live and development URL's
I just got started with Drupal for Facebook and it's working great. I've added Facebook Connect to my live site. Now I want to develop new functions and so I have another instance of my website for development, with a different URL. The problem is that the url of the website is specified in the Facebook Application settings (Site URL, Deauthorize URL, Post-Authorize URL). So I can't do any meaningful development on the dev website.
I could of course set up a seperate application on Facebook. But then I'd have to edit everything twice - not ideal. Is there a better solution? How do you do it?