Hey I just seen your name on the index page. I was not in the server or on the forums for a couple months now because of school, and I just came back, so I think a few others will be able to post more because of not being in school.
I don't have any ideas, but what if people in the server started posting here on the forum? I always wondered why all those people in the game didn't post here. Most of them say they are scared of being made fun of if they post here. If something could "bring" them from the game to the forum, there would be a little bit more activity. But summer is coming, and people will have more time on the computer I guess. Once people get out of school, we'll probably see a lot of posts.
Otherwise, you could just make small contests here, like answer a few questions (once a week) with 5000 experience to the winner, the point being to make people look at the forum, and make them register their name here, making it easier for them to post in other topics.
I bet everyone else will have better ideas. Good luck