Is there any chance someone could add a brief reference and link to the online svn repository somewhere on the front page of matplotlib? Maybe in the sidebar under "Need help?":
For details on what's new, see the detailed changelog <http://matplotlib.sourceforge.net/_static/CHANGELOG> **or browse the source code**. Anything that could require changes to your existing codes is logged in the api changes <http://matplotlib.sourceforge.net/api/api_changes.html> file.
where "source code" links to http://matplotlib.svn.sourceforge.net/viewvc/matplotlib/
I've run out of fingers and toes for counting how many times I have to click around and hunt this down (and I always forget to bookmark it or I'm on a new computer!)