The first beta of Leonardo 0.6 is now available at
http://jtauber.com/2005/leonardo/leonardo-0.6b1.tgz
Leonardo is the Python-based content management system that runs this site.
I'm still putting together a list of what's new since 0.5 but it's big: comments, trackbacks, file upload, categories and heaps of internal improvements.
Try it out and let me know below or via email how you go.