Yes, you can change the style of the Forum.
Once you are logged in, click on "Profile" in the Menu box. On the Profile screen, scroll down to the Preferences area. Towards the bottom of that group there's a field called Board Style with a drop down list (default id NeverwinterNights). Pick any one of the available styles. Then scroll to the bottom and click Submit. On the subsequent screen click on the "Click Here to return to forum index" or wait a few seconds and it should refresh itself. If you don't like that style just repeat the process and try one of the others.
Didn't see a style that you liked? Email the Forum Administrator and more can be made available.