I stumbled upon this nice Wordpress addon a while ago. With the addon you have the ability to add nice buttons with text, subtext and link. You can also add a custom color by simple adding the color code.
The buttons would be used in posts & threads, pages. It would be nice if it worked with XenPorta as well.
A simple option to allow certain usergroups to use the bbcode.
Quick demonstration in the BB Code Help section on "how to use" would suffice.