A list of implementations for other languages such as Perl and Python can be found on the XML-RPC site.
I've developed classes which encapsulate XML-RPC values, clients, messages and responses. Using these classes it's possible to operate and query XML-RPC servers.
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
Keep up with the latest Advogato features by reading the Advogato status blog.
If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!