I'm probably out of my territory (I don't have a phone right now[1]), but my first UI instinct would be to allow address book entries to be grouped (or tagged o

I'm probably out of my territory (I don't have a phone right now[1]), but my first UI instinct would be to allow address book entries to be grouped (or tagged or labelled, the actual mechanism is secondary), and on first request from the app being asked what groups I'd like to allow it access to. Bonus points for the option to create a per-app group and put some users in right there and then. But as I said, outside of my territory. [1] I'm not that old, really.