The new wiki should be current up to the point where we started importing content from the Wikia wiki, which was about a week or two ago. On top of that, other editors have been working to update anything remaining that's out of date. Only thing is, it's hard to convince people to move by directly pointing them off the Wikia wiki without invoking the wrath of Wikia. We already got their attention when Pooshlmer requested a full database dump for us (which ended up not working anyway =/).
Also, Pooshlmer was quite slow in responding to us for awhile, but he did update the Site Notice today to point at the new wiki. Unfortunately there's only a few places you'll actually see it, so you'd have to post a link on the mainpage to get the message across. And that brings us back to the previous issue.
So basically, it's a live site, and it being "finalized" just depends on how much people edit stuff there. In the mean time, we're trying to replace functionality of Wikia's proprietary Mediawiki extensions with normal ones available to MW.
[Edit] I take that back, it looks like they did manage a move post on the WoWWiki mainpage. I guess the same could be done for touhou.wikia.com too.
Thing is, we can just up and move the site lock, stock, and barrel. There's always going to be the older Wikia site, and hopefully as time progresses and the older site gets more and more outdated compared to the new one, people will stop using it. It sucks but it's what all of the wikis moving off Wikia have had to deal with. For example,
WoWWiki (Wikia version) vs.
Wowpedia (new version). Notice there's no indication of the move...?