diff --git a/sleekxmpp/plugins/xep_0030/disco.py b/sleekxmpp/plugins/xep_0030/disco.py
index 92ee5ec..2e993e2 100644
--- a/sleekxmpp/plugins/xep_0030/disco.py
+++ b/sleekxmpp/plugins/xep_0030/disco.py
@@ -90,6 +90,10 @@ class xep_0030(base_plugin):
         self.description = 'Service Discovery'
         self.stanza = sleekxmpp.plugins.xep_0030.stanza
 
+        # Retain some backwards compatibility
+        self.getInfo = self.get_info
+        self.getItems = self.get_items
+
         self.xmpp.register_handler(
                 Callback('Disco Info',
                          StanzaPath('iq/disco_info'),
@@ -248,7 +252,8 @@ class xep_0030(base_plugin):
             return self._fix_default_info(info)
 
         iq = self.xmpp.Iq()
-        iq['from'] = kwargs.get('ifrom', '')
+        # Check dfrom parameter for backwards compatibility
+        iq['from'] = kwargs.get('ifrom', kwargs.get('dfrom', ''))
         iq['to'] = jid
         iq['type'] = 'get'
         iq['disco_info']['node'] = node if node else ''
@@ -285,7 +290,8 @@ class xep_0030(base_plugin):
             return self._run_node_handler('get_items', jid, node, kwargs)
 
         iq = self.xmpp.Iq()
-        iq['from'] = kwargs.get('ifrom', '')
+        # Check dfrom parameter for backwards compatibility
+        iq['from'] = kwargs.get('ifrom', kwargs.get('dfrom', ''))
         iq['to'] = jid
         iq['type'] = 'get'
         iq['disco_items']['node'] = node if node else ''
@@ -317,7 +323,7 @@ class xep_0030(base_plugin):
         """
         self._run_node_handler('del_items', jid, node, kwargs)
 
-    def add_item(self, jid=None, node=None, **kwargs):
+    def add_item(self, jid=None, name='', node=None, subnode='', ijid=None):
         """
         Add a new item element to the given JID/node combination.
 
@@ -325,12 +331,15 @@ class xep_0030(base_plugin):
         a node value to reference non-addressable entities.
 
         Arguments:
-            jid   -- The JID to modify.
-            node  -- The node to modify.
-            ijid  -- The JID for the item.
-            inode -- Optional node for the item.
+            jid  -- The JID for the item.
             name  -- Optional name for the item.
+            node  -- The node to modify.
+            subnode -- Optional node for the item.
+            ijid   -- The JID to modify.
         """
+        kwargs = {'ijid': jid,
+                  'name': name,
+                  'inode': subnode}
         self._run_node_handler('add_item', jid, node, kwargs)
 
     def del_item(self, jid=None, node=None, **kwargs):
@@ -345,7 +354,7 @@ class xep_0030(base_plugin):
         """
         self._run_node_handler('del_item', jid, node, kwargs)
 
-    def add_identity(self, jid=None, node=None, **kwargs):
+    def add_identity(self, category='', itype='', name='', node=None, jid=None, lang=None):
         """
         Add a new identity to the given JID/node combination.
 
@@ -358,24 +367,29 @@ class xep_0030(base_plugin):
         names are different. A category and type is always required.
 
         Arguments:
-            jid      -- The JID to modify.
-            node     -- The node to modify.
             category -- The identity's category.
             itype    -- The identity's type.
             name     -- Optional name for the identity.
             lang     -- Optional two-letter language code.
+            node     -- The node to modify.
+            jid      -- The JID to modify.
         """
+        kwargs = {'category': category,
+                  'itype': itype,
+                  'name': name,
+                  'lang': lang}
         self._run_node_handler('add_identity', jid, node, kwargs)
 
-    def add_feature(self, jid=None, node=None, **kwargs):
+    def add_feature(self, feature, node=None, jid=None):
         """
         Add a feature to a JID/node combination.
 
         Arguments:
-            jid     -- The JID to modify.
-            node    -- The node to modify.
             feature -- The namespace of the supported feature.
+            node    -- The node to modify.
+            jid     -- The JID to modify.
         """
+        kwargs = {'feature': feature}
         self._run_node_handler('add_feature', jid, node, kwargs)
 
     def del_identity(self, jid=None, node=None, **kwargs):
diff --git a/tests/test_stream_xep_0030.py b/tests/test_stream_xep_0030.py
index 1f98974..25a4102 100644
--- a/tests/test_stream_xep_0030.py
+++ b/tests/test_stream_xep_0030.py
@@ -406,10 +406,10 @@ class TestStreamDisco(SleekTest):
         self.xmpp['xep_0030'].make_static(jid='tester@localhost',
                                           node='testing')
 
-        self.xmpp['xep_0030'].add_item(jid='tester@localhost',
+        self.xmpp['xep_0030'].add_item(ijid='tester@localhost',
                                        node='testing',
-                                       ijid='tester@localhost',
-                                       inode='foo',
+                                       jid='tester@localhost',
+                                       subnode='foo',
                                        name='Test')
 
         self.recv("""
@@ -446,10 +446,10 @@ class TestStreamDisco(SleekTest):
         self.xmpp['xep_0030'].make_static(jid='user@tester.localhost',
                                           node='testing')
 
-        self.xmpp['xep_0030'].add_item(jid='user@tester.localhost',
+        self.xmpp['xep_0030'].add_item(ijid='user@tester.localhost',
                                        node='testing',
-                                       ijid='user@tester.localhost',
-                                       inode='foo',
+                                       jid='user@tester.localhost',
+                                       subnode='foo',
                                        name='Test')
 
         self.recv("""