dd and hhah = horror site
sf.dd = unique
So the three sections are covered by 2 passwords. At first i attempted to share passwords between sf and hhah, but it caused problems with sessions and marking which forums were read. That and the fact that horror fans and necessarily scifi fans and it was just easier to keep them as seperate registrations.
So you need to register at hhah to post on anything horror, and that's both frontpage and forums.