I have added a whole list of new "Styles" you can choose from for the forum. These RADICALLY change the look and feel of the forum.
You go to here http://www.xymox1.com/Forum/LHC/ucp.php?i=165
And then change your "Board Style"
The default Style is Black Pearl.
If you prefer a more traditional forum and widescreen support give Prosilver a try
AeroBlue is quite nice. A clean traditional forum style.
If you prefer a X-Treme experience try out X-Treme
If you are a WoW player, try WoWMaevahEmpire to feel right at home
Interesting layouts are Pro_Ubuntu and SubMerged
BuisnessBoard was so radical I had a hard time figuring out how to navigate.
Many more phpBB3 styles are available. If you see one you like, I would be happy to add it. For example http://www.phpbb3styles.net/db/