This sounds really interesting and I'm looking forward to seeing what you've got. Had several conversations with people about contact management and address books in the past and I expect you've had similar discussions. I'm curious to know your opinions.

One of the discussions I had revolved around ownership of data and there were basically two points of view, both perfectly valid.

The first PoV was that an owner/curator sees the address book as theirs and if they add someone's details to it, those details should remain until the owner/curator decides to remove them. The second PoV was that someone should be able to 'grant access' to their contact info and if either party decides to break the connection, the contact info should disappear from both address books.

I'm firmly in the former camp since I don't like the idea of my address book becoming a volatile place (esp. since I have over 2k+ people in there). However, I can see the argument for having more control over who has my contact info.

I'm curious to know what approach you (and Everyme) has taken and what you think of the points above. Am I off the mark?