You're joking, right? There are at least two dozen Web-based forums, not to mention the dozen-plus on Yahoo Groups alone.
Mind you, every contribution helps, but you should know you're venturing into a crowded field here.
FYI, your board looks like a phpBB knock-off. Was there something about their paid version that you didn't find in the freely distributed phpBB?
In any case, good luck with your forum!
-- Gordon Author: Constructing Robot Bases, Robot Builder's Sourcebook, Robot Builder's Bonanza