I didn't intend a wiki for tutorials, but for analyses. Notes that one particular artistic goal was accomplished in several different ways, with an accounting of each way and its draw. Something that a newbie wouldn't find interesting, but that a serious artist could learn well from. And I don't think such a wiki would reduce discussion at all... if anything, it would increase knowledge of specific techniques and create a reference point for the same. Now of course if you're just gonna rehash the same old thing over and over and focus on communicating that knowledge one person at a time, then I suppose a forum-only solution is indeed superior (or a chat room). However, this won't make the best artists any better.