Are you completely sure you can handle running a forum? Yeah, it's easy, but can you do it alone? I've run a few forums in my day, but it was always wise to have back-up.
Once ZeaLitY or Ramsus (preferably Ramsus) gets to this thread, they'll tell you how to get things going. I've only ran invisionfree boards.
I joined, by the way.