Coming from the iphone, one of the features I really miss is being able to toggle between 'silent' and 'general' profiles by flipping a hardware switch.

Is there any solution to implement this on the N900? One idea I had would be to reprogram the 'power' button to toggle profiles if it is held down for N seconds when the device is locked (and vibrate or something to notify user of profile change. I do not use the power button for locking/unlocking the phone so something like this would be ideal for me

I would try and implement something my self, but I have no idea where to begin on developing something like this.