The Washington Times has an automated tagging application, based on Django-Tagging and utilizing OpenCalais for data retrieval. Check it out here.

This Python module is a wrapper around the OpenCalais API. It makes REST calls to the OpenCalais API via HTTP POST, then parses and simplifies the JSON responses returned by OpenCalais. You can then access the response data in a much more pythonic manner.

Tested with Python 2.5.