[Velocd]

Yep, it's not very unique at all.

Thus, it'll be hard to attract new members, since there are so many other forums out there alike.

If it's a design forum, I suggest giving it a really wicked design (sounds like a no brainer ). People should be convinced its all about design from their first visit.

Just don't install some "trendwhor3" design, as they're called, seen so often around the web.
e.g. http://digital-forums.com/ (no offensive to the forum or members, I'm only speaking on behalf of its style)

A profession design like this is nice:
http://www.graphic-forums.com/index.php?styleid=1

(rounded corners always bring about attention)

About all the advice I can give.