Generic font families in Safari

I think the single thing that is most missing from Safari, from my perspective, is a user interface to change the fonts that are used for the CSS generic font families (serif, sans-serif, monospace, etc.)

Firefox and Camino do have this, though of course few people understand what it does. But now there is actually one extremely prominent site out there that uses the generic font families in its stylesheets: Wikipedia (and other MediaWiki wikis). So it might have a little more visibility.