What Tweetbacks does, after adding a line of code to your blog template, is display all of the Tweets that link to that blog post. It does this by finding mentions of the URL on Twitter, accounting for the top 5 link shortening services like TinyURL and Bit.ly. The result is a listing of Tweets about your blog post that looks much like regular blog comments:
In other words, if we had Tweetbacks installed on this blog (which we might someday soon!), and you tweeted “check out this awesome mashable post – http://tinyurl.com/tweetbacksrule” that Tweet would show up in our comment area. This is truly fantastic – while we get a lot of comments on most Mashable posts, it pales in comparison to the volume of tweets that some of our entries generate.
Twitter CEO Evan Williams was pretty excited about the development too, tweeting “@danzarrella just launched something I had drawn on our whiteboard a couple weeks ago: http://tinyurl.com/9e4ank” Zarrella has already added a WordPress plugin to the service for easy setup.