diff --git a/gunicorn/main.py b/gunicorn/main.py
index 8cd05812..13c004db 100644
--- a/gunicorn/main.py
+++ b/gunicorn/main.py
@@ -97,7 +97,6 @@ def daemonize(umask, user=None, group=None):
             except OSError:	# ERROR, fd wasn't open to begin with (ignored)
                 pass
         
-
         os.open(util.REDIRECT_TO, os.O_RDWR)
         os.dup2(0, 1)
         os.dup2(0, 2)
@@ -106,7 +105,6 @@ def main(usage, get_app):
     parser = op.OptionParser(usage=usage, option_list=options(),
                     version="%prog " + __version__)
     opts, args = parser.parse_args()
-    
 
     app = get_app(parser, opts, args)
     workers = opts.workers or 1
@@ -117,15 +115,7 @@ def main(usage, get_app):
     if bind.startswith("unix:"):
         addr = bind.split("unix:")[1]
     else:
-        if ':' in bind:
-            host, port = bind.split(':', 1)
-            if not port.isdigit():
-                raise RuntimeError("%r is not a valid port number." % port)
-            port = int(port)
-        else:
-            host = bind
-            port = 8000
-        addr = (host, port)
+        addr = util.parse_address(bind)
     
     umask = int(opts.umask or UMASK)
 
@@ -144,12 +134,8 @@ def main(usage, get_app):
     
 def paste_server(app, global_conf=None, host="127.0.0.1", port=None, 
             *args, **kwargs):
-    if not port:
-        if ':' in host:
-            host, port = host.split(':', 1)
-        else:
-            port = 8000
-    bind_addr = (host, int(port))
+    
+    bind_addr = util.parse_address(host, port)
 
     # set others options
     debug = kwargs.get('debug')
@@ -236,13 +222,8 @@ def run_django():
     main("%prog [OPTIONS] [SETTINGS_PATH]", get_app)
     
 def run_paster():
-    
-    import os
-    
     from paste.deploy import loadapp, loadwsgi
 
-    __usage__ = "%prog [OPTIONS] APP_MODULE"
-
     _scheme_re = re.compile(r'^[a-z][a-z]+:', re.I)
 
 
diff --git a/gunicorn/management/commands/run_gunicorn.py b/gunicorn/management/commands/run_gunicorn.py
index a8e36136..2e29b9cd 100644
--- a/gunicorn/management/commands/run_gunicorn.py
+++ b/gunicorn/management/commands/run_gunicorn.py
@@ -17,6 +17,7 @@ from django.core.handlers.wsgi import WSGIHandler
  
 from gunicorn.arbiter import Arbiter
 from gunicorn.main import daemonize, UMASK
+from gunicorn.util import parse_address
  
 class Command(BaseCommand):
     option_list = BaseCommand.option_list + (
@@ -49,15 +50,7 @@ class Command(BaseCommand):
         if bind.startswith("unix:"):
             addr = bind.split("unix:")[1]
         else:
-            if ':' in bind:
-                host, port = bind.split(':', 1)
-                if not port.isdigit():
-                    raise CommandError("%r is not a valid port number." % port)
-                port = int(port)
-            else:
-                host = bind
-                port = 8000
-            addr = (host, port)
+            addr = parse_address(bind)
 
         admin_media_path = options.get('admin_media_path', '')
         workers = int(options.get('workers', '1'))
diff --git a/gunicorn/util.py b/gunicorn/util.py
index ce4fee9d..8fdc1bdc 100644
--- a/gunicorn/util.py
+++ b/gunicorn/util.py
@@ -30,6 +30,17 @@ monthname = [None,
              'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
              
 
+def parse_address(host, port=None, default_port=8000):
+    if not port:
+        if ':' in host:
+            host, port = host.split(':', 1)
+            if not port.isdigit():
+                raise RuntimeError("%r is not a valid port number." % port)
+            port = int(port)
+        else:
+            port = default_port
+    return (host, int(port))
+    
 def get_maxfd():
     maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
     if (maxfd == resource.RLIM_INFINITY):