Social software can help pool like-minded people to combine their strengths for a common goal. This study has examined one of such systems empirically - a new flavor of Wiki we have developed that supports content protection. Writers seek an audience who can review and comment on their work. The proposed design was driven by the recognition that writing is both a private and collaborative process. Extending the regular open editing environment of Wiki can support the creation of this dual-process environment. The qualitative results from our experiment are encouraging and point at the direction that collaborative writing using Wiki can benefit from both a private and public space. We observed that the private space played an important role in the collaboration, ameliorated some of the perils associated with anonymity, and helped enhance the overall quality of team writing.