Yes this forum is for eqoa, not just frontiers though. I don't think it's exclusively for the american version, it should also be useful to someone outside the US. I don't know first hand because I've never played outside the US, but it sounds like there is only one server for overseas. I also read something that frontiers wasn't available yet over seas but have heard conflicting reports on this. If you don't have frontiers yet thought that would explain why you can't play as an ogre (or an alchemist). I would try browsing through the official sony web site to find out more.
http://everquestonlineadventures.station.sony.com/
GL