I modify or run a couple of wiki sites, specifically MediaWiki. I found a program, mvs, that seemed to do great, but I kept wanting it to do more. Not to mention, the long lines mode for Emacs kind of sucks. So, I decided to throw together a little library and mvs-like took, written in C#, C5, and my own libraries that allows for the download and upload of wiki pages, complete with CVS/SVN-like conflicts.
At the moment, it can download pages, upload content. The program also handles checking for conflicts and those related functions. The only major feature left is a Gtk# front end that makes it easy to edit and control the entire process.