The wiki is up. There’s not much content yet, so feel free to add & edit pages if you want to. It uses the same account system as the game, however, you do not need to have a paid account to edit the wiki. A WYSIWYG editor is available, so no knowledge of wiki markup is required.
Don’t login to the wiki if you don’t want your SkyCorp username to be publicly shown, as MediaWiki keeps a public log of usernames.