<presence from='your-id@yahoo.com/yahoo-messanger' to='name_room@conference.nimbuzz.com/your-id'><x xmlns='jabber:x:avatar'><hash>8dbc74f79d550e44501fd2f0d19926c7684c2a40</hash></x><x xmlns='http://jabber.org/protocol/muc#user'><item jid='your-id@yahoo.com/yahoo messanger' affiliation='participant' role='none'/></x></presence>