Get one-to-one chat to actually work...

shell/PresenceWindow.py

@@ -2,8 +2,10 @@ import pygtk
 pygtk.require('2.0')
 import gtk
 import gobject
+import dbus
 
 from sugar.presence.PresenceService import PresenceService
+from sugar.presence.Service import Service
 from sugar.chat.BuddyChat import BuddyChat
 
 class PresenceWindow(gtk.Window):
@@ -23,6 +25,8 @@ class PresenceWindow(gtk.Window):
 		self._pservice.connect("buddy-disappeared", self._on_buddy_disappeared_cb)
 		self._pservice.start()
 		
+		self._pservice.track_service_type(BuddyChat.SERVICE_TYPE)
+		
 		self._setup_ui()
 
 	def _is_buddy_visible(self, buddy):