Would it be possible to add a factions section to the forums?
Factions and clans could have recruitment threads wherein they specify the major details of their faction and outline an application procedure for new recruits. It could also add a new element of organization for larger factions as faction-wide news could be posted in that faction's thread for all their members to read (if it's not tactically important that is - I'm lookin' at you, pvpers ;P).
It will help new players to glean some information as to the social landscape of the server as well. Whether factions are pvp/pve and, possibly, things like who are they at odds with? Who are their enemies? Are they generally ruthlessly hostile or do they like to keep the peace? Having knowledge like this and a list of joinable factions will help new people to integrate into the social environment that is ground zero much quicker and I think more people will be active and eager to play. (Not that they shouldn't be excited to play here anyways, I know I am
)
It might even stimulate pvp a bit as larger groups are formed and it becomes possible to have battles on a larger scale than is currently possible. And it would promote teamwork and camaraderie right from the outset of a player joining the forums.
Basically, it would put information, put up by the factions themselves, about the factions in one easy to find place for people to read and consider before joining in the server.
I suggest this because it's one of the first things I look for in new games; like minded people to play with. And, in my experience, working with a group of organized individuals towards overarching goals that would otherwise be impossible for a lone player often provides much more satisfaction than the game itself can offer.