Not that I think they will but I've actually hit Apple up with a request for this feature. All I was is a simple way to set up a few different presets such as 3G on, wifi off, locations on (for when I'm in the car) and 3G off, wifi on, locations off (for when I'm home). I'm a battery nazi, I hate watching things I'm not using drain it.
I doubt an APP will be released to do it. I don't think apple will let one monkey around with the settings in such a way.