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diff --git a/sleekxmpp/exceptions.py b/sleekxmpp/exceptions.py
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+# -*- coding: utf-8 -*-
+"""
+    sleekxmpp.exceptions
+    ~~~~~~~~~~~~~~~~~~~~
+
+    Part of SleekXMPP: The Sleek XMPP Library
+
+    :copyright: (c) 2011 Nathanael C. Fritz
+    :license: MIT, see LICENSE for more details
+"""
+
+
+class XMPPError(Exception):
+
+    """
+    A generic exception that may be raised while processing an XMPP stanza
+    to indicate that an error response stanza should be sent.
+
+    The exception method for stanza objects extending
+    :class:`~sleekxmpp.stanza.rootstanza.RootStanza` will create an error
+    stanza and initialize any additional substanzas using the extension
+    information included in the exception.
+
+    Meant for use in SleekXMPP plugins and applications using SleekXMPP.
+
+    Extension information can be included to add additional XML elements
+    to the generated error stanza.
+
+    :param condition: The XMPP defined error condition.
+                      Defaults to ``'undefined-condition'``.
+    :param text: Human readable text describing the error.
+    :param etype: The XMPP error type, such as ``'cancel'`` or ``'modify'``.
+                  Defaults to ``'cancel'``.
+    :param extension: Tag name of the extension's XML content.
+    :param extension_ns: XML namespace of the extensions' XML content.
+    :param extension_args: Content and attributes for the extension
+                           element. Same as the additional arguments to
+                           the :class:`~xml.etree.ElementTree.Element`
+                           constructor.
+    :param clear: Indicates if the stanza's contents should be
+                  removed before replying with an error.
+                  Defaults to ``True``.
+    """
+
+    def __init__(self, condition='undefined-condition', text=None,
+                etype='cancel', extension=None, extension_ns=None,
+                extension_args=None, clear=True):
+        if extension_args is None:
+            extension_args = {}
+
+        self.condition = condition
+        self.text = text
+        self.etype = etype
+        self.clear = clear
+        self.extension = extension
+        self.extension_ns = extension_ns
+        self.extension_args = extension_args
+
+
+class IqTimeout(XMPPError):
+
+    """
+    An exception which indicates that an IQ request response has not been
+    received within the alloted time window.
+    """
+
+    def __init__(self, iq):
+        super(IqTimeout, self).__init__(
+                condition='remote-server-timeout',
+                etype='cancel')
+
+        #: The :class:`~sleekxmpp.stanza.iq.Iq` stanza whose response 
+        #: did not arrive before the timeout expired.
+        self.iq = iq
+
+class IqError(XMPPError):
+
+    """
+    An exception raised when an Iq stanza of type 'error' is received
+    after making a blocking send call.
+    """
+
+    def __init__(self, iq):
+        super(IqError, self).__init__(
+                condition=iq['error']['condition'],
+                text=iq['error']['text'],
+                etype=iq['error']['type'])
+
+        #: The :class:`~sleekxmpp.stanza.iq.Iq` error result stanza.
+        self.iq = iq