My favorite Twitter application TweetDeck just got better by previewing their Real-Time User-Streams features.
Most of your Twitter columns will update in true real-time
Twitter actions, such as favourite/unfavourite & follow/unfollow, that relate to your account are shown in true real-time
You have the option to also see @replies from your friends to other people that you don’t follow. This is not currently possible using the existing API.
Downlaod –> TweetDeck User-Streams Preview