Wikis seems well-suited to replacing certain newsgroups that primarily enable inexperienced software users or developers to find answers to their questions. I see the following benefits:
I'm finding it difficult to get people to use wiki. It's just different enough to put them off :-(
I've found it hard to get people to start using a sparsely populated wiki. Unless some people get immediate value, they won't come back. If you can start with a small number of people who "get it," work with them to populate the wiki, and then bring others in. If people see immediate value, getting them to the next step--where they see the value of actively participating--is a lot easier. -- DaveSmith
For some strategies to deal with this problem, see WhyDontOthersGetWiki and PromotingWiki.
Also see CoreContributorFoundation. After the initial work has been put in, then it becomes self-sustaining, especially if you allow WikiHomePages. People will identify more with Wiki because a small part of it is "theirs". My $0.02. I fully agree with the above-mentioned advantages of Wiki.'' -- CarlosNsRodrigues