http://unmatchedstyle.com/news/how-a-chaos-monkey-created-wikipedia-mobile.p...
Podcast interview with Hampton Catlin, who in 2008 "was brought on board to lead the development of Wikipedia’s mobile project. ... Upon his departure, he assumed that Wikipedia would do a responsive rewrite, but noted that the mobile site he created is still being used, although with a few new features." [disclaimer: haven't actually listened to the audio]