A lot of people know that I’ve done a bit with maintenance of WordPress using subversion. Alot of those same people have asked me to show how it’s done. It’s not very difficult, really, but I encourage you to work with a host like Dreamhost that provides one click installs of svn. It’s the easiest way to get web accessible repositories to use for maintenance of all your various WordPress blog.
Here’s video 1 in this series, which demonstrates the creation of an SVN repository and the basic file structure that is best practice for a repository.