Iphone "shortcuts" for wifi / 3g / localization
Yes, Apple has added some URL shortcuts for these functions and Jeff Broderick (blog at http://brdrck.me/ ) has assembled a nice dashboard of these shortcuts with gorgeous icons to save the web clips to the home screen of your iOS device.


Wifi toggle from http://brdrck.me/settings/wifi


Simply browse your iOS device to http://brdrck.me/settings/ and pick from the many web clips that he has assembled. These are basically the same as taking a web site in the iPhone configuration utility and adding it to your home screen with a nice icon. I don't see one set up for Localization/International or 3G but will poke around to see if I can figure out the syntax to get those sorted for you.