Develop a relation between the Address Book contacts info/Twitter friends info and the Address Book contacts URL field (with a "Twitter" custom label or a contained value that match "http://twitter")/Twitter account URL, synchronizing the Twitter friends and Address Book contacts.

1. If a Twitter friend match an existing Address Book contact by Name and Surname or Nickname(Twitter username) and/or Company name without a URL field that refers to a Twitter account:
Tweetie can ask (need human verification) to update the contact with this new informations and fill, if missing, also the contact picture.

2. If a Twitter friend don't match any Address Book contact by Name and Surname or Nickname(Twitter username) and/or Company name:
Tweetie can ask (need human verification) to create a new contact in the Address Book with the Twitter account URL field.

3. If an Address Book contact match a Twitter account URL that don't match any Twitter friend:
Tweetie can ask (need human confirmation) to follow this Twitter account.

If contacts/friends are mapped the (future) friends auto-completion can be made by real Name/Surname/Company name.

A positive side effect is that for now Twitter users can organize their friends with the Address Book groups.