I thought about adding a wiki to the site a couple years ago. It seems like it would take a lot of admin/moderation work to create one of high quality. Accounting for the deliberate wrongdoer could be quite a burden, although there are various ways to deal with that.
There's an opportunity cost with each new project added. I honestly didn't see the wiki coming out near the top. I figured that my best bet would be to write a book and/or create other info products. I think the value delivery would be higher than with a wiki.
Other projects I'd probably rank higher than a wiki would be video blogging and webinars. |