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diff --git a/src/mailman/archiving/mhonarc.py b/src/mailman/archiving/mhonarc.py
new file mode 100644
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+++ b/src/mailman/archiving/mhonarc.py
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+# Copyright (C) 2008-2009 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""MHonArc archiver."""
+
+from __future__ import absolute_import, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'MHonArc',
+    ]
+
+
+import hashlib
+import logging
+import subprocess
+
+from base64 import b32encode
+from urlparse import urljoin
+from zope.interface import implements
+
+from mailman.config import config
+from mailman.interfaces.archiver import IArchiver
+from mailman.utilities.string import expand
+
+
+log = logging.getLogger('mailman.archiver')
+
+
+
+class MHonArc:
+    """Local MHonArc archiver."""
+
+    implements(IArchiver)
+
+    name = 'mhonarc'
+
+    @staticmethod
+    def list_url(mlist):
+        """See `IArchiver`."""
+        # XXX What about private MHonArc archives?
+        web_host = config.domains[mlist.host_name].url_host
+        return expand(config.archiver.mhonarc.base_url,
+                      dict(listname=mlist.fqdn_listname,
+                           hostname=web_host,
+                           fqdn_listname=mlist.fqdn_listname,
+                           ))
+
+    @staticmethod
+    def permalink(mlist, msg):
+        """See `IArchiver`."""
+        # XXX What about private MHonArc archives?
+        message_id = msg.get('message-id')
+        # It is not the archiver's job to ensure the message has a Message-ID.
+        # If no Message-ID is available, there is no permalink.
+        if message_id is None:
+            return None
+        # The angle brackets are not part of the Message-ID.  See RFC 2822.
+        if message_id.startswith('<') and message_id.endswith('>'):
+            message_id = message_id[1:-1]
+        else:
+            message_id = message_id.strip()
+        sha = hashlib.sha1(message_id)
+        message_id_hash = b32encode(sha.digest())
+        del msg['x-message-id-hash']
+        msg['X-Message-ID-Hash'] = message_id_hash
+        return urljoin(MHonArc.list_url(mlist), message_id_hash)
+
+    @staticmethod
+    def archive_message(mlist, msg):
+        """See `IArchiver`."""
+        substitutions = config.__dict__.copy()
+        substitutions['listname'] = mlist.fqdn_listname
+        command = expand(config.archiver.mhonarc.command, substitutions)
+        proc = subprocess.Popen(
+            command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+            shell=True)
+        stdout, stderr = proc.communicate(msg.as_string())
+        if proc.returncode <> 0:
+            log.error('%s: mhonarc subprocess had non-zero exit code: %s' %
+                      (msg['message-id'], proc.returncode))
+        log.info(stdout)
+        log.error(stderr)