I see that this forum is (mostly) dead, save for updates from the last few developers
I think what's needed is organized effort on two fronts - release of the game, and marketing.
Release is probably more important, as frequent releases generate press coverage that results in new players. OA hasn't seen a release for nearly 2 years (!). I know development is slow, but nevertheless "release frequently" has been proven to work much better than "release once every few years".
I can def. pitch in with some marketing, but without releases it's kind of hard to market a game with no players..