It would be interesting to see what might happen in either of those use-cases for an app which syncs address books with a remote service, such as Google, Yahoo!

It would be interesting to see what might happen in either of those use-cases for an app which syncs address books with a remote service, such as Google, Yahoo! or CRM tools. It's entirely conceivable that if a user hits no it could have rammifications to other systems which wouldn't expect either of these results.