I've tried contacting Disqus support but they haven't answered. I need to disable pre-approval for comments but i can't find where to set that option. Could anyone help me? Thanks.
Just found the solution: you gotta disable Disqus 2012 features on your website (pre-moderation haven't been implemented on Disqus 2012 yet, despite being almost 2013 already).
Here's the article where i found the solution: http://help.disqus.com/customer/portal/articles/708758-how-to-enable-settings-missing-from-disqus-2012