That is nicely done.
Looking at the View Source, it doesn't look too complicated, here's the 'second story' link:
Code:
<div style="float:right;"><a href="http://www.e90post.com/forums/showthread.php?t=567644"><img src="/wp-content/themes/next/mythumb.php?src=http://www.bimmerpost.com/storyimages/4c59d569-2e00-f3fc.jpg&h=135&w=205&zc=1" alt="E90 Owner Gets Creative With Ambient Light Controlled LED Angel Eyes" width="205" height="135" border="0" /></a><br />
</div>
The part in red is just a hard link to the thread in the forum. Note that the forum software is in the 'forums' sub-folder. I don't see a sign-in for the Wordpress part, so maybe there are user accounts only for the forum, which would keep things simple for user management. Put Wordpress in the site root and the forum software in its own sub-folder, use separate databases for each, should work easily enough...