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Disqus already has the ability to cross post to Twitter if you have a Disqus account already. And if you comment on multiple blogs, that still might be the best way to set it up. But if you just want to quickly leave a comment on Web Upd8 and have it shown to all your Twitter followers, Disqus makes that super easy with a big “Sign In with Twitter” button.
Go ahead and try it: if you’re not logged into Disqus, click the big “Sign In with Twitter” button and leave a comment on this post. It’ll appear in your Twitter stream right away.