Just came out today. Although you could always insert a tweet into wordpress using blackbird, a new widget / service from twitter just came out the provides a rich Twitter interactive widget. Nice.
From Twitter :
To see Web Intents in action, check out WordPress.com’s great tool for quoting Tweets in blog posts: Twitter Blackbird Pie. Here’s a post that uses their tool to quote @jack’s Tweets about our 5 year anniversary. We’ve also added these standard Tweet actions to our timeline widgets that are used all over the web, so if you’re already using them you should see this feature live today.