After a week a installation trouble, the wiki is finally up. http://www.myosity.com/wiki/
Initially, the wiki will be a repository for mostly technical information (API documentation, Interop, etc), but may evolve over time to include help documentation, and perhaps even user-managed pages supporting 3rd party applications.
The wiki uses the latest (beta, in fact) version of a great open source engine that I've used for years on various projects. I highly recommend it: Screwturn Wiki