My favorite anecdote from PyOhio 2009:
William McVey prepared slides for his Sunday PyOhio presentation using reStructuredText and rst2s5, but he wasn't satisfied with S5's presentation quality. He tried rst2odp to generate an OpenOffice Impress document instead, but it failed him.
So he convened a Saturday night sprint on rst2odp at PyOhio. Working past midnight, a small team fixed the rst2odp flaws. William regenerated his slides and presented successfully on Sunday.
Finally, in a mighty feat of recursion, he described the feat in a lightning talk Sunday evening, using slides generated by rst2odp, including a slide that contained the source code of the lightning talk he was giving, including the slide with the source code...