- Ideas for Addressbook:
    - use mapserver to locate address
        see http://www.mozilla.org/mailnews/arch/addrbook/hiddenprefs.html
            which example:
        http://www.mapquest.com/maps/map.adp?country=@CO&address=@A1%20@A2&city=@CI&state=@ST&zipcode=@ZI

    - print labels
    - notify other contacts that address changed
    - contact groups
    - related contacts eg. family members, assistents
    - Synchronize Address Book contacts with Microsoft Exchange servers.
    - Make mailing list from addresses in addressbook.
    - Birthday reminders

