I have a client who would like to emulate the way the archive works on this site, http://www.garancedore.fr/archives/
We're not so much bothered about the ajax reloading, but rather the /archives/ area with subsequent links leading to /archives/2012/01 etc. I'm pretty sure I can create the navigation area easily enough, but I'm just struggling with the permalink set-up.
Is the archive here http://www.garancedore.fr/archives/ based on a plugin of some sort? does anyone know how to achieve that kind of archive structure?