diff --git a/plugins/Status/plugin.py b/plugins/Status/plugin.py
index 58bda4290..b7e814b58 100644
--- a/plugins/Status/plugin.py
+++ b/plugins/Status/plugin.py
@@ -109,11 +109,11 @@ class Status(callbacks.Plugin):
             timeElapsed = utils.timeElapsed(elapsed)
         except KeyError:
             timeElapsed = _('an indeterminate amount of time')
-        irc.reply(_('I have received %s messages for a total of %s bytes.  '
-                  'I have sent %s messages for a total of %s bytes.  '
-                  'I have been connected to %s for %s.') %
-                  (self.recvdMsgs, self.recvdBytes,
-                   self.sentMsgs, self.sentBytes, irc.server, timeElapsed))
+        irc.reply(format(_('I have received %s messages for a total of %S.  '
+                  'I have sent %s messages for a total of %S.  '
+                  'I have been connected to %s for %s.'),
+                  self.recvdMsgs, self.recvdBytes,
+                  self.sentMsgs, self.sentBytes, irc.server, timeElapsed))
     net = wrap(net)
 
     @internationalizeDocstring
@@ -160,10 +160,10 @@ class Status(callbacks.Plugin):
                         irc.error(_('Unable to run ps command.'), Raise=True)
                     (out, foo) = inst.communicate()
                     inst.wait()
-                    mem = out.splitlines()[1]
+                    mem = int(out.splitlines()[1])
                 elif sys.platform.startswith('netbsd'):
-                    mem = '%s kB' % os.stat('/proc/%s/mem' % pid)[7]
-                response += _('  I\'m taking up %s kB of memory.') % mem
+                    mem = int(os.stat('/proc/%s/mem' % pid)[7])
+                response += format(_('  I\'m taking up %S of memory.'), mem)
             except Exception:
                 self.log.exception('Uncaught exception in cpu.memory:')
         irc.reply(utils.str.normalizeWhitespace(response))
diff --git a/plugins/Status/test.py b/plugins/Status/test.py
index 4843c4145..d6781dfab 100644
--- a/plugins/Status/test.py
+++ b/plugins/Status/test.py
@@ -44,7 +44,8 @@ class StatusTestCase(PluginTestCase):
         self.failIf('None' in m.args[1], 'None in cpu output: %r.' % m)
         for s in ['linux', 'freebsd', 'openbsd', 'netbsd', 'darwin']:
             if sys.platform.startswith(s):
-                self.failUnless('kB' in m.args[1],
+                self.failUnless('B' in m.args[1] or 'KB' in m.args[1] or
+                                'MB' in m.args[1],
                                 'No memory string on supported platform.')
         try:
             original = conf.supybot.plugins.Status.cpu.get('children')()
diff --git a/plugins/Web/plugin.py b/plugins/Web/plugin.py
index 7ecc334b9..ea5a60aa4 100644
--- a/plugins/Web/plugin.py
+++ b/plugins/Web/plugin.py
@@ -154,15 +154,15 @@ class Web(callbacks.PluginRegexp):
         try:
             try:
                 size = fd.headers['Content-Length']
-                irc.reply(format(_('%u is %i bytes long.'), url, size))
+                irc.reply(format(_('%u is %S long.'), url, size))
             except KeyError:
                 size = conf.supybot.protocols.http.peekSize()
                 s = fd.read(size)
                 if len(s) != size:
-                    irc.reply(format(_('%u is %i bytes long.'), url, len(s)))
+                    irc.reply(format(_('%u is %S long.'), url, len(s)))
                 else:
                     irc.reply(format(_('The server didn\'t tell me how long %u '
-                                     'is but it\'s longer than %i bytes.'),
+                                     'is but it\'s longer than %S.'),
                                      url, size))
         finally:
             fd.close()
@@ -188,7 +188,7 @@ class Web(callbacks.PluginRegexp):
             irc.reply(_('That URL appears to have no HTML title.'))
         else:
             irc.reply(format(_('That URL appears to have no HTML title '
-                             'within the first %i bytes.'), size))
+                             'within the first %S.'), size))
     title = wrap(title, ['httpUrl'])
 
     _netcraftre = re.compile(r'td align="left">\s+<a[^>]+>(.*?)<a href',
diff --git a/src/utils/str.py b/src/utils/str.py
index 93f541d2f..ff5b22f4a 100644
--- a/src/utils/str.py
+++ b/src/utils/str.py
@@ -363,7 +363,7 @@ def timestamp(t):
         t = time.time()
     return time.ctime(t)
 
-_formatRe = re.compile('%((?:\d+)?\.\d+f|[bfhiLnpqrstuv%])')
+_formatRe = re.compile('%((?:\d+)?\.\d+f|[bfhiLnpqrsStuv%])')
 def format(s, *args, **kwargs):
     """w00t.
 
@@ -378,6 +378,7 @@ def format(s, *args, **kwargs):
     p: pluralize (takes a string)
     q: quoted (takes a string)
     n: nItems (takes a 2-tuple of (n, item) or a 3-tuple of (n, between, item))
+    S: returns a human-readable size (takes an int)
     t: time, formatted (takes an int)
     u: url, wrapped in braces (this should be configurable at some point)
     v: void : takes one or many arguments, but doesn't display it
@@ -428,6 +429,15 @@ def format(s, *args, **kwargs):
                 return nItems(t[0], t[2], between=t[1])
             else:
                 raise ValueError, 'Invalid value for %%n in format: %s' % t
+        elif char == 'S':
+            t = args.pop()
+            if not isinstance(t, (int, long)):
+                raise ValueError, 'Invalid value for %%S in format: %s' % t
+            for suffix in ['B','KB','MB','GB','TB']:
+                if t < 1024:
+                    return "%i%s" % (t, suffix)
+                t /= 1024
+
         elif char == 't':
             return timestamp(args.pop())
         elif char == 'u':