Steven Blyth worked on this nice concept for his thesis at IDII:
Your phone’s screen shows a crowd of human figures, each an avatar of one of your friends, acquaintances or relatives. The frequency of all digital communications between you and each person, which the system monitors, determines that avatar’s posture: an alert stance indicates frequent recent contact, for example; a lethargic posture or turned back means neglect. You can also register non-digital contacts manually. The avatars can be grouped manually according to sentiment, category, and so on, or programmed to begin clustering together before an upcoming event: your family before a birthday, say.