Styles: A PBwiki Style Resource

Anyone who has visited the PBwiki forums knows that a lot of the solutions offered in there are tiny bits of CSS, wrapped in <style> tags. You put a snippet of code somewhere and things happen, like your sidebar disappears, or moves to the left side of the page. But add a few of these snippets and your code isn't so pretty and what's worse, other users have to dig through it and get all confused.