JESUS CHRIST YES GET A WIKI.
I would be willing to contribute to it as well, however, I think it would be best for the dev team to concentrate their efforts on development... As great as a wiki sounds, I think it would be significantly better if there was a lot more material... things like random events, quests and whatnot... It would make it more interesting and give people something that they actually need to look up on a wiki, they'll want to figure out how to trigger the quest to get that girl from the anime that they like, ect.
As of now, a tutorial and the manual is all you need to get a real good understanding of the game.. there is not a lot of in depth content that requires a wiki.
There also doesn't seem to be a huge fanbase, but I think that's because people just haven't heard of this game... I think it's amazing, it could definitely be bigger then slave-maker 3 I think. In fact, i'm going to go make a few posts in some forums about it...