Have recently become enamored of subversion, not just as a developer’s tool but as a software management system. WordPress and Drupal installations and updates become trivial when you throw away FTP.
Realized there was no WordPress Codex page on managing WordPress via svn, so I wrote one (Codex is a MediaWiki site). Covers installing and tracking the trunk release, but also (and this is the info I originally set out to find but couldn’t), installing and tracking stable release versions. Linked from the Getting Started/Installation section.
Since there are probably thousands of WordPress blogs that were originally installed without subversion, but that people might want to convert over for the sake of dirt-simple future upgrades, tossed in a recipe for converting “traditional” WP installs to subversion-style installs.