Hi, I've never used a wiki before. I have a lot of experience with Wordpress, and some (frustrating) experience with Drupal.

Right now I don't have the time to learn something new if there is a steep learning curve, so I'm hoping for something fairly intuitive.

My new pet project will involve a lot of collaborative writing online, will need users with moderator privileges, and discussion of pages by users. Also a flagging system (much like Wikipedia), for articles (when there is an error, when the page is too incomplete, etc.).

Right now I'm looking at Mediawiki. I've discarded Tikiwiki because I hear there's a steep learning curve.

Is MediaWiki a good choice for such a project, or are there any other recommendations you might have?

Thanks.