You wont make me forget about my suggestion though. Make a dedicated button for things like this, and everyone will be happy. That's what they SHOULD do. Remapping buttons is asking for trouble. Just add a button that can be remapped to do whatever, and problem solved. People seem to only quote where i don't make this suggestion. It's interesting.
I can't add a button to my existing £600 phone now can I? The buttons are already there (even two of them), and allowing them to be remapped as an opt-in choice for consumers would keep the phone cleaner. I don't want a multitude of buttons: we already have two plus silent switch on the side.
Oh and by the way, you are aware that Apple allows people to remap their home button triple-click (previously double-click), right?