Code Librarian reads raw cvs repositories, and the version running at the pike site is sadly outdated nowadays.
Current state of the art Code Librarian flourishes at Opera Software ASA, where it's replaced (and somehow in the process adopted the name of) a legacy hack called cvsdoc. I think there has been talk about packaging it for an (inofficial) release, possibly in time for the conference.
Most of the reason Code Librarian exists is because cvs (and not yet covered svn) really stink for the kind of visualization Code Librarian provides, in a way I think git doesn't, though. (Not that it wouldn't be nice with git coverage, of course; we're creatures of habit, after all.)
(Not that I've really tried the git query tools yet; my X11 is broken, and I haven't found any with a native mac backend.)