Twitter is in the process of rolling out a new user interface update to its users.
This update focuses on Twitter's Following and Follower pages. In addition to a better looking list, Twitter has added more social actions to the page, including @replies, direct messages, and mobile update subscription. An extra collapsed "List View" has also been added to the traditional "Expanded View" and makes for a much more readable and quickly scannable page.
Due to the lack of a good way to browse, filter, and search through these lists, they are largely underused. This update is the first step in making Twitter's Following and Follower lists into much more usable and functional tools. In fact, it wouldn't surprise me if Twitter continued to build out these features more in the future, bringing in some of the functionality that third party applications have long included, such as TweetDeck's groups.
Click through to see what Twitter's new List View looks like.