Favstar.fm : Favstar API for Twitter ClientsSign in to Favstar and your favs and retweets will be shown instantly. Introduction The Favstar API allows an app to embed a web view, and use OAuth Echo to identify the user. By passing an api_key you can identify your app, and Favstar will adjust user actions such as follow and fav to utilize your url scheme. There's also an API for recording a Tweet of the Day which is becoming quite a popular
