Looks like I might be a little late to the party, but welcome.
And while you can't do any full blown advertising, it is possible to include the site you made yourself in your Profile. Just go to Forum Profile Information, and the last two boxes there.
Yeah, I would love to, but I dont want anyone joining just yet. I want one of my friends to be the first member to join and she is away for a few more days, and even after that, the site still needs improvements. you see, ive got four clans from OoS, summer winter etc, and they can view eachother's HQs, I dont know how to fix that. Ive ordered banners and I think i know how to apply those and I will be good. after all that the site is mostly done. I guess ill link to ZU for my profile.