I’m a fan of wikis but when used appropriately. In other words, no matter how much you like wikis at a technology, that doesn’t mean they’re right for all situations. Here’s a way to think about it: blogs are for conversation, wikis are for collaboration. Just because you have three people editing your Web site, that doesn’t mean it should be based on wiki software.
Additionally, those that say that Wikipedia isn’t a good resource, are using a different Wikipedia than I am. I use it almost daily. Occasionally I find myself looking elsewhere to verify the information Wikipedia contains but generally it is right.