Here's something I think could really benefit as an XmlRpcToWiki client: TouchGraph
I have it running right now on my Windows machine, playing around with navigating MeatballWiki, seeing the linkage connections that up until now I'd only seen in my head. It's really great to see them layed out in front of me, and to see them shift and expand an explode as I traverse from node to node. This is cool tech.
The XmlRpcToWiki connection comes in where this app uses some "low tech" methods. The XmlRpc interface explicitly defines getAllPages() and getPageLinks() methods that would be perfect for this app.