I've worked in a number of places that use wikis to store project information. Often they can work well, at other times they seem to break and be completely useless. I notice there is now a Wikipatterns site documenting some of the patterns in wiki use. Most of these patterns originate or are documented in a form on c2.com but having this site helps establish a best practice. Looking at the history the site is less than a month old, hopefully it will turn into a useful resource for mentors who want to introduce wikis.