Kushi made a nice layout with a background for each individual forum.
Having this ability in a plugin for editing forums would make for a very unique and clean look, something that PunBB would have that not many forums if any would.
Another nice addition would be to have a logo or banner possibility for the categories. You would be able to make a clean and easy navigation for users with more visual cues like this.
Would anyone be interested in helping with this?