I think I've got the various servlets on elharo.com that drive the Fibonacci web services used as examples in Processing XML with Java running again. They went down a few months ago when security issues necessitated switching the server from Red Hat to a supported distribution. If you weren't able to connect over the last few months, please try them again and let me know if they work for you.
I'm now using Apache 2.0 and Tomcat 5. Tomcat 5 is a definite improvement over Tomcat 4 in several ways. It was much easier to install the servlets than it had ever been before. I just uploaded a .war file through a web interface and they worked immediately. However, the connection between Tomcat and Apache is still painful to set up, and the documentation ranges from poor to actively misleading. The Apache Project has a nasty habit of not considering decent documentation to be a prerequisite for a release.
Living Logic has released XIST 2.5, a Python library fopr generating XHTML generator. "XIST is also a DOM parser (built on top of SAX2) with a very simple and pythonesque tree API. Every XML element type corresponds to a Python class and these Python classes provide a conversion method to transform the XML tree (e.g. into HTML)."