All the source code should be available in the ZIP package you can get from
http://vaadin.com/download . The AddressBook example is in demo/src in the package com.vaadin.demo.tutorial.addressbook, and the portlet definitions are in WebContent/WEB-INF/*.xml .
You can also check out the complete source code from our SVN or browse the SVN contents - see
http://vaadin.com/src .
Although I cannot say who has packaged and uploaded that version, I believe it should be the address book tutorial I referred to, just re-packaged - or does it have some features that are not present in the basic tutorial version?