One of the things that irritates me about Wikis is the lack of offline support. I’m not referring to read-only offline dumps. I’m referring to the ability to read, make changes, and promote those changes upward. It’s amazing that there are tools that manage teams of people editing the same files concurrently [GIT, CVS, SVN, etc], however of the wiki’s I’ve used none of them reuse this functionality.  Most Wiki’s store the content in text files, which the versioning control tools handle natively.