diff --git a/eventlet/api.py b/eventlet/api.py
index 18bb4fb..e9877fa 100644
--- a/eventlet/api.py
+++ b/eventlet/api.py
@@ -231,6 +231,7 @@ def sleep(timeout=0):
 
 switch = greenlib.switch
 getcurrent = greenlet.getcurrent
+GreenletExit = greenlet.GreenletExit
 
 
 class Spew(object):
diff --git a/eventlet/coros.py b/eventlet/coros.py
index d430969..9f02312 100644
--- a/eventlet/coros.py
+++ b/eventlet/coros.py
@@ -24,7 +24,6 @@ THE SOFTWARE.
 
 import time
 import traceback
-import greenlet
 
 
 from eventlet import api
@@ -62,7 +61,7 @@ class event(object):
         occured.
         """
         if self._result is NOT_USED:
-            self._waiters[greenlet.getcurrent()] = True
+            self._waiters[api.getcurrent()] = True
             return api.get_hub().switch()
         if self._exc is not None:
             raise self._exc
@@ -93,6 +92,15 @@ class event(object):
         for waiter in self._waiters:
             hub.schedule_call(0, greenlib.switch, waiter, self._result)
 
+
+def execute(func, *args, **kw):
+    evt = event()
+    def _really_execute():
+        evt.send(func(*args, **kw))
+    api.spawn(_really_execute)
+    return evt
+
+
 class CoroutinePool(pools.Pool):
     """ Like a thread pool, but with coroutines. """
     def _main_loop(self, sender):
@@ -104,7 +112,7 @@ class CoroutinePool(pools.Pool):
                 result = func(*args, **kw)
                 if evt is not None:
                     evt.send(result)
-            except greenlet.GreenletExit:
+            except api.GreenletExit:
                 pass
             except Exception, e:
                 traceback.print_exc()
diff --git a/eventlet/httpc.py b/eventlet/httpc.py
index 981d2e2..3d68242 100644
--- a/eventlet/httpc.py
+++ b/eventlet/httpc.py
@@ -485,10 +485,11 @@ class HttpSuite(object):
              **kwargs):
         if headers is None:
             headers = {}
-        if content_type is None:
-            headers['content-type'] = self.fallback_content_type
-        else:
-            headers['content-type'] = content_type
+        if 'content-type' not in headers:
+            if content_type is None:
+                headers['content-type'] = self.fallback_content_type
+            else:
+                headers['content-type'] = content_type
         return self.request_(connect(url), method='PUT', url=url, body=data,
                              headers=headers, dumper=self.dumper,
                              loader=make_safe_loader(self.loader), ok=ok,
@@ -508,7 +509,7 @@ class HttpSuite(object):
               **kwargs):
         if headers is None:
             headers = {}
-        if 'content-type' in headers:
+        if 'content-type' not in headers:
             if content_type is None:
                 headers['content-type'] = self.fallback_content_type
             else:
diff --git a/eventlet/httpd.py b/eventlet/httpd.py
index fe0d3ba..e47d2ab 100644
--- a/eventlet/httpd.py
+++ b/eventlet/httpd.py
@@ -405,6 +405,7 @@ class HttpProtocol(BaseHTTPServer.BaseHTTPRequestHandler):
                 self.close_connection = True
                 continue
 
+            self._code = 200
             request = Request(self, self.command, self.path, self.headers)
             request.set_header('Server', self.version_string())
             request.set_header('Date', self.date_time_string())
diff --git a/eventlet/jsonhttp.py b/eventlet/jsonhttp.py
index 3a22d0e..4228a39 100644
--- a/eventlet/jsonhttp.py
+++ b/eventlet/jsonhttp.py
@@ -29,4 +29,5 @@ import simplejson
 suite = httpc.HttpSuite(simplejson.dumps, simplejson.loads, 'application/json')
 head, get, put, delete, post = (
     suite.head, suite.get, suite.put, suite.delete, suite.post)
-
+head_, get_, put_, delete_, post_ = (
+    suite.head_, suite.get_, suite.put_, suite.delete_, suite.post_)