Slavemaker is a "doujin" work, which is, inherently, all about violation of copyright. Per http://en.wikipedia.org/wiki/D%C5%8Djinshi#Copyright_issues as retreived 3/13/12:
Despite being in direct conflict with the Japanese copyright law as many dōjinshi are derivative works and dōjinshi artists rarely secure the permission of the original creator, Comiket is still permitted to be held twice a year and holds over half-a-million people attending each time it convenes. However, the practice of dōjinshi can be beneficial to the commercial manga market by creating an avenue for aspiring manga artists to practice, and talented doujinshi creators are contacted by publishers. This practice has existed since the 1980s. Salil Mehra, a law professor at Temple University, hypothesizes that because dōjinshi market actually causes the manga market to be more productive, the law does not ban dōjinshi as the industry would suffer as a result.
That means, for the most part, only the text parts of Slavemaker (including the Actionscript and XML code) and the Slavemaker Wiki are "original."
So, regarding the text (as defined above): You retain ownership of all copyrights you may have in any text (collectively, any "User Submissions") that you submit to the Slavemaker Wiki. However, by submitting User Submissions to SMW, you hereby grant SMW a perpetual, irrevocable, worldwide, non-exclusive, royalty-free, license to use, adapt, modify, distribute, prepare derivative works of, display, and perform the User Submissions (in whole or in part), for any purpose whatsoever, and to incorporate User Submissions in other works in any form, media, or technology now known or later developed.