If you just call logging.getLogger() in a middleware, nothing works (in Essex).
However, this is incorrect:

diff --git a/keystone/middleware/s3_token.py b/keystone/middleware/s3_token.py
index 0c5b103..f72a9ca 100644
--- a/keystone/middleware/s3_token.py
+++ b/keystone/middleware/s3_token.py
@@ -36,6 +36,8 @@
 
 """Starting point for routing S3 requests."""
 
+import logging
+from logging.handlers import SysLogHandler
 import httplib
 import json
 
@@ -46,6 +48,12 @@ from swift.common import utils as swift_utils
 
 PROTOCOL_NAME = "S3 Token Authentication"
 
+logger = logging.getLogger(__name__)
+logger.propagate = False
+logger.addHandler(SysLogHandler(address='/dev/log',
+                                facility=SysLogHandler.LOG_LOCAL0))
+logger.setLevel(logging.INFO)
+
 
 class S3Token(object):
     """Auth Middleware that handles S3 authenticating client calls."""
@@ -145,6 +153,9 @@ def filter_factory(global_conf, **local_conf):
     conf = global_conf.copy()
     conf.update(local_conf)
 
+    # P3
+    logger.info("s3 factory")
+
     def auth_filter(app):
         return S3Token(app, conf)
     return auth_filter

Here's the commentary:

<zaitcev> anotherjesse2: http://people.redhat.com/zaitcev/tmp/x.diff
<jaypipes> zaitcev: all that code should already have been run in setup_logging() before the pipeline even initalizes the middleware...
<jaypipes> anotherjesse: can you verify that setup_logging() has been called?
<bcwaldon> jaypipes: if so, then what jesse has in that paste is fine, right?
<bcwaldon> jaypipes: RE logging
<jaypipes> bcwaldon: should be... depends on the code that comes before the middleware initialization... setup_logging() needs to be called before load_paste_app().
<bcwaldon> jaypipes: but the middleware is getting a different logger than the setup would do
<bcwaldon> jaypipes: since the setup would be for glance or nova, but he's using a keystone logger
<jaypipes> bcwaldon: in setup_logging(), try putting logger.propogate = True