The Guild of Writers website's appearance has recently been overhauled to match Tweek's Wordpress layout! Both the wiki and forum now match the style of the main website, thanks to Lyrositor.
However, bugs and unstyled elements abound as with any styling project of this size, and so help would be appreciated on fixing them. As of the time of this writing, the wiki theme is rather complete, and any bugs found are probably quite rare. The forum, on the other hand, probably has a quite a few hidden areas waiting to be reworked. If you wish to contribute, you can fork the associated git repository and submit pull requests (or submit issues if you're not a web designer).
The old theme is still available, both in the wiki and on the forum.