Hi! 
Here I provide a patch that could be useful for some dynamic_reconfigure users.
As it was discused on: http://answers.ros.org/question/12158/multiple-dynamic_reconfigure-servers-in-the-same-node/?answer=30722#post-id-30722

It is interesting in many cases to have multiple configure servers on the same node. Currently this is not possible with python (while it is possible on C++).
Here I attach a patch to make this possible on python. The way is simple, locate each configuration server on different local namespaces "~/"+server_name_prefix

Regards.
--
Pablo Iņigo Blasco.
Computer Architecture Department. University of Seville (Spain)
http://es.linkedin.com/in/pibgeus | http://geus.wordpress.com/category/robotics/