One of the problems I had for a long time with the RSS feeds of the different blogging systems is the difficulty to generate an RSS feed for a specific category only. For example, this blog includes entries on, say, the Semantic Web, but also on Hungarian issues (possibly in Hungarian). Obviously, I would not want to export an RSS feed for an audience on Semantic Web that would include those Hungarian entries… But it was impossible to do that with wordpress, for example.
I made therefore such a conversion script in python. It really is only a wrapper around Mark Pilgrim’s excellent universal feed parser. You can use this script as some sort of an off-line converter or (via a separate small script) as a CGI script on your server. Just copy the python files in the appropriate directories corresponding to your local setup. For convenience’s sake I have also added the source of the universal feed parser to the distribution.