Ok, how about a contest for players to create and publicly submit unique models, particle effects and/or ability/buffs (or whichever of these is workable for you) and the winner gets a free game and inclusion of their creation in the mod?
I don't mean an entire mod, but a single, unique and creative element/feature that stands out.
That way we all get to see what the modding community can do here and everyone will get the benefit of it too. You might even draw in modders from other games elsewhere and get them hooked on Sins.
What say ye rascally developer reavers?
