In the excitement of the upcoming JB of the iPhone 4s, I have been looking around and getting all wanted hacks n tweaks in order for the big day. The one hack I am desperately wanting is to be able to silent the notification sound from blaring in your ear while on an active phone conversation. That absolutely drives me nuts when I am speaking on an important call and my friends decide to blow up my phone with text messages. Please tell me there is a hack out there to silent that notification until I get off the phone. I would JB just to get that tweak alone. Is there such one?