I set up a suggestion at the forum setup by Microsoft for WP7 and I thought it would be really convenient to have radio toggles on the lockscreen by swiping downward. If you guys think this is a good idea maybe you might wanna give it a vote? here's the link: Lockscreen Radio Toggles so what do you all think?
seems like a solution looking for a problem - if you pin Settings to your start screen you get similar ability. It's one extra move to unlock the screen first, but not sure it's worth developing a lock screen ability to change settings.