The workflow tools at my prior job were built around Subversion. When I started working there, I was sad to give up "Effortless Ctags with Git" and Fugitive. Porting those concepts was necessary to keep my sanity. Itchy, meet Scratchy: Ctags for SVN. A small tweak to our workflow tools got it call ctags_for_svn.sh when appropriate.
I also made a symlink called cs in my bin directory pointing to the ctags_for_svn.sh script. So updating a checkout's ctags is as simple as typing cs.
(I'll append it here when I get a chance.)