It's a decent idea. I think a problem will be that you are trying to compete too much with stackoverflow.

* "provide a community reviewed wiki explaining what X is about": http://stackoverflow.com/tags/javascript/info

* "provide a Stackoverflow like QA section": http://stackoverflow.com/questions/tagged/javascript

* "provide an chatroom to replicate the IRC experience": http://chat.stackoverflow.com/rooms/17/javascript

That's definitely part of the issue. When I viewed your site, I didn't have a clue what it did, or whether those were the only categories (they seem to be) or what features were even available here.

But I think your bigger issue is that your site feels completely dead. I mean, it's not hard to find the QA section or chat when you view a topic, but the lack of activity here means there's no real incentive to contribute. I mean, why ask a question if no one else is asking or answering any questions?

So my advice would be to focus on getting the site active to begin with. Maybe do like Reddit and make a bunch of fake users to ask questions about Django and Javascript and whatever else, then answer them with either your main account or one of the other fake ones. That way, when people view the Q/A pages or chats, they'll think there's an actual community there willing to help them out, and actually post a few questions.

It sound like you are trying to compete with codementor.io the problem is that Metal Manac doesn't say anything meaningful and it looks kinda boring with just the bootstrap and no theme. You need to work on the integration between the features and UX, make it memorable! There was a HN tread recently that even bad web design can bring you more visitors/users as long as it's memorable and stands out from the croud.