This is a new feature

Skins can now have a _skin.class.php file to override default Skin behaviour and provide skin specific settings. Demo: the custom skin has configurable header colors. The settings can be changed through Blog Settings > Skin Settings (fplanque) -- Anyone is welcome to extend those settings for any skin you like.

http://i41.tinypic.com/ojlczn.png

yea, kinda neat.. but i didnt like the extra 'skin set.' tab though

Thanks Guys :)