Discuss on Twitter is a WordPress plugin that uses Twitter as the commenting system for your blog.
I've been developing it over the past few weeks along with Fred Wilson and Kirk Love as part of the launch of AVC 3.0 which went up yesterday. It's currently live on this blog, as well as AVC and also USV.com.
The idea is pretty simple: whenever you publish a new post, the post is auto-tweeted to your account. Then, you get a "Discuss on Twitter" button on your post, which will prompt a reply to the auto-tweet, as well as a "View Discussions" button which will link to the Twitter thread.
Twitter is a natural place to discuss long-form content on the web, and moving blog commenting to Twitter can both engage people in a natural way and help expand distribution and reach.
I should pause here and note that the core WP/Twitter functionality is provided by the amazing WP to Twitter plugin created by Joe Dolson. Joe's plugin does all the heavy lifting of authenticating with twitter and teeing up the tweets. It's really configurable and nice. Thank you Joe.
This is alpha software (Version 0.3 to be precise), so we are still testing and tuning. Totally open to feedback, so please send any ideas on github or in the comments.... er, on Twitter
Enjoy!