http://wiki.lesswrong.com/ is now live, for all our Wiki needs. The previous Wikia wiki has been imported. Knock yourself out on linking there from comments or blog posts (yes, you will have to link manually, there is no CamelCase convention yet on the blog and comments).
See here for proposed wiki usage guidelines - note that these do not yet seem to appear in the Wiki itself, hint hint.
I think that on the margin, many people's effort would be better directed to the wiki than to making posts and comments on lesswrong. Are there ways we could increase the incentives for wiki contributions? e.g. Make a LW blog post/comment stating, this is what I added to the wiki [link], and then giving people a chance to give them karma.
Why?