Very few Macs at work, and little need to try the collaborative writing/editing process at home, but I’m curious about SubEthaEdit (formerly known as Hydra). I’ve installed it, but haven’t used it with someone. Someone documented what happened with an open shared blank document. Sounds like the usual stages of a mailing list: quiet discussion, growth to the point of interest, and then the tipping point of enough bad apples to ruin it for everyone. I’m interested in SubEthaEdit and wikis as tools for capturing requirements and writing documentation, two tasks that can work well collaboratively, but few like to do on their own. Or, even if you like to frame the problem yourself, it’s hard to get useful feedback in an integrated form. Version tracking, etc., are some of the answers, but I want to lower the barrier of entry.