I succesfully use Facebook auth for my Tornado-based site using FacebookMixin. I also have Facebook Connect auth enabled for my Disqus, which placed in page using javascript widget. When user already logged in using FB to my site, they still have to log to FB again when they want to comment using Disqus.
How Discus FB Connect suppose to works? I assumed i got seamless FB auth between those two (FacebookMixin/Disqus)