Are there any apps out there for S60 v5 phones that let you override the hardware buttons with custom actions?

I find the lack of a hardware mute on my Nokia 5530 annoying... The power-profile to silent button is a two step process or even three step when the key guard is on. How about having the camera button mute the phone any time (even when the keyguard is on)?

Also, I would love to override the volume buttons to control the music player's next/previous track action.

If somone would create this app with other features it be a good seller in the OVI store