Addressbook v.0.4 is now available. A major bug with the editing function has been fixed, and a user-requested new feature introduced.
You can now embed an addressbook list into your posts or pages. Insert <addressbook /> wherever you want a semantically-markedup list of your addresses to appear. You can change the look of the list through your theme’s stylesheet.
To upgrade to this version, simply overwrite the old addressbook.php file in your /wp-content/plugins directory, and next time you view the addressbook page (Manage » Addressbook) the update will occur. No database changes are made this time.