Index: django/db/models/query.py
===================================================================
--- django/db/models/query.py	(revision 6110)
+++ django/db/models/query.py	(working copy)
@@ -109,6 +109,13 @@
 
     def __len__(self):
         return len(self._get_data())
+        
+    def __nonzero__(self):
+        try:
+            self.__getitem__(0)
+            return True
+        except IndexError:
+            return False
 
     def __iter__(self):
         return iter(self._get_data())