One of my goals of this redesign was to make this site skinnable by simplifying my code. Well, it seems both have happened. :-)
While I doubt anyone will every write their own stylesheet for this site, the possibility exists. Check out the site preferences page to change the stylsheet used when viewing or pringint this site, or to specify your own. Of course, since I have CSS turned off for a bit, only your own stylesheets will work for now.