phpBB forums are actually very easy to theme. Something that would flow with you theme may be the Glass Red theme you can find here:
http://demo.phpbb3styles.net/Glass+RedWe used to use this one on our first SS site we had. It has red/black which i think would go nicely with your website theme, although the red is a fair bit brighter than yours. There is a dropdown menu on that site where you can have an instant live preview of each theme. It takes all of about 5 minutes to install a new theme, and only seconds to change it to a new one if you don't like it.
Here's another we have used more recently on our first SS site:
http://demo.phpbb3styles.net/X-Treme+RedHere's one I think you could personalize to make it look good for your needs:
http://demo.phpbb3styles.net/sacred2dark just need to either ditch the background images or swap them out for some pretty OS images

Also if anybody could EVER find Fodder you could ask him which theme he based the website off of. I helped him with it but I have no clue which theme it was. It would have had all its own forum theme complete with matching icons. If I could find it then it would be a simple install like any other phpBB theme.
EDIT: I have found the theme that Fodder used. If Eric sees this and he is interested then I will put the theme together for you guys.