Any chance of an enable/disable 3G on home screen?

Is there any way an App could allow users to enable or disable 3G with an icon on the home screen? I get much better voice reception on Edge but better data speeds on 3G. It is a pain though to go through all the settings to turn it on and off.

I'd love to be able to leave it off and just have a single button on the home screen to turn 3G on when I'm going to use an internet app.

Any chance of seeing this type of program in the near future? Does Apple restrict access to the settings menu for 3rd Party Developers?