ions. 
          Linking. History browsing. Sharing. Voting. Profiles. Friends.
        </li>
        <li>
          Text, voice and video chat. In-game chat with avatars on the
          map. Integrated video player for help, tutorials and
          lessons. Integrated html frame for synchronized web browsing.
        </li>
        <li>
          MediaWiki integration, to support creative writing by students
          and courseware development by teachers.
        </li>
        <li>
          PayPal integ