Whilst not a strong suit of mine yet I have put together two (albeit similar) forum skins for a couple of car clubs. Both clubs are using the phpBB open source bulletin board software. The phpBB developers describe this as:
Millions of people use phpBB on a daily basis, making it the most widely used open source bulletin board system in the world. Whether you want to stay in touch with a small group of friends or are looking to set up a large multi category board for a corporate website, phpBB has the features you need built in. - phpBB
The two skins I put together are only graphical at this stage and retain the standard layout and views that phpBB provides. This is an area that I am definitely keen to explore further so please do contact me if you have a forum skin or customisation in mind, I'd love the challenge.
The two previous skins I have done are the Hot Rod Revue, a Hot Rod enthusiasts car club and the CJC, a modern, international car scene car forum and blog.