ToddGee.commie

One thing I've often wished for is the ability to insert user-written CSS into a page or set of pages on a Drupal site.

It would: 

Found this site with cool, free site templates offered
http://www.ramblingsoul.com/
 
Another:
http://themebot.com/website-templates/drupal-themes

Some links to themes I like:
http://drupal.org/project/affaires
http://themegarden.org/drupal50/?q=node&theme=thirteen
used for http://friendsofgoetheschool.org/
http://drupal.org/node/204929
used for http://chicagobiketrailers.org