/o/
btw Darkalenia, the site uses BBCode, which is a markup language similar to HTML. The site's parser examines your post for brackets surrounding keywords like [b][/b], [table][tr][td]1[/td][td]2[/td][/tr][/table], etc, converting each tag to HTML.
Scragg has complete control over what the tags are, which he matches them with the HTML equivalent, and also has his parser read
Inline CSS, which isn't as powerful as writing a stylesheet, but it is enough for the purpose of a forum.
There are also special tags, like [youtube]url[/youtube], [soundcloud]url[/soundcloud], and [skydrive]url[/skydrive], which takes the iframe code generated from those sites, and the parser takes the URL you put between those tags in the code to display your video, music, etc.
We don't have full access to iframes for security purposes, but this at least lets us use those services safely.