Twitter is a fast growing service that millions of people (including all of us here at Disqus) use to easily update and get updates from friends. We recently released the ability to tweet out comments for commenters with a Disqus Profile. This allowed people to share their comments on Twitter and bring in new voices to the conversation (see this in action).

Today, we released a new feature for publishers: Twitter Sign-in.

Fortunately, with such a descriptive name, there’s not much explanation needed. It is what it sounds like: sites are now able to allow people to use their Twitter profiles to leave comments. And yup, these commenters will also be able to tweet out to their updates. No Disqus Profile necessary.

Disqus makes use of Twitter’s OAuth support to securely authenticate without sharing any passwords. Similarly to our support for Facebook Connect, Twitter Sign-in makes it easier and quicker for people to jump into a discussion. To enable Twitter Sign-in, publishers should proceed to Admin/Settings and enable the feature under Options.

For commenters, just look for the Twitter Sign-in button on sites that have this enabled.

If you already have a Disqus Profile, add Twitter in your account/services to be able to tweet comments with every comment.

Bonus! Improvements to Tweeting Comments

We’ve also added a new option for publishers. You can now assign a Twitter account to your site’s settings, which will be @included in the tweet that commenters send out from your site.

For example, we’ve added @disqus to this blog’s settings. Now for every comment that people tweet (which aren’t replies), it will be formatted:

RE: @disqus Tweeting from the Disqus blog. http://disq.us/2gx

If no twitter account is specified for the site, the default option is the site administrators twitter account. You can find this option in Admin/Settings.

Enjoy!