diff -r d5d9acadb975 -r 1236d9058ad3 server/sources/pyrorql.py
--- a/server/sources/pyrorql.py	Tue Dec 03 15:46:19 2013 +0100
+++ b/server/sources/pyrorql.py	Tue Jan 07 17:45:48 2014 +0100
@@ -20,6 +20,11 @@
 __docformat__ = "restructuredtext en"
 _ = unicode
 
+# module is lazily imported
+import warnings
+warnings.warn('Imminent drop of pyrorql source. Switch to datafeed now!',
+              DeprecationWarning)
+
 import threading
 from Pyro.errors import PyroError, ConnectionClosedError