Yes Ikonboard does have this facility to make sub forums. I cannot remember how to do it or the options. Its in forum control somewhere, you make a forum a sub forum, then when you create a newer one you list it under the forum rather than the category. I moved my IKB over to Invision cos I use Invision for my site, and whenever I needed to change something in the OKB I could never remember how to do it!
Otherwise the site does look great!
