How to add theme settings to Zen-based themes?

I'm trying to place my own theme settings into a drupal subtheme. i've used the forms API in theme-settings.php but they are not showing up in admin/build/themes/settings/$mytheme. my theme-settings.php is uploaded here in case you'd like to see it. what it does is choose vocabularies for categories and tags, ma开发者_StackOverflowking it easier to port wordpress blogs to drupal.

so, the thing seems to be in mytheme.info it seems i need to place a default value here in order to have the settings saved. but i guess it doesn't make any sense.