Add functionality to mute tone for user status changes, but allow tone for new conversations.
Getting a tone every time someone changes status is annoying. However, if I turn off those sounds, I don't get a sound when a new conversation comes in. If I don't see the blinking icon, I may miss the conversation.
Separate tone options for status changes and incoming calls/conversations. And I agree that allowing tones to be changed for individuals or groups (like cell phones allow) would be good.