Thread Genius recently launched with the goal of mapping the world's visual taste. Thread Genius believes that web recommendations based on text fall short of capturing consumers' true taste. Its computer vision technology captures taste on visual input. Its API opens the service to others.
Twitter recently added more data to each tweet it returns via the API. Now your applications can access the number of retweets, whether you have retweeted a tweet and additional information about the user who wrote the tweet. The new information used to require subsequent calls to the Twitter API, or perhaps looking up a cached value from your own database.