Twitterwall

"Twitterwalls or Tweetwalls are a public screen with all latest posts at twitter concerning one special keyword or hashtag. They are a new way to let people show their feedback simultaneously to a stage presentation. Twitterwalls are big screens or video projections at events like barcamps, trade fairs or conferences. With a twitterwall people in the auditorium are 'talking' about what they see or hear at the event. Other people from somewhere in the world e.g. watching a live video from the event can virtually attend and 'write' the own post on the wall. Twitterwalls are also used in newsrooms to keep twitter in sight"

How to create your own twitterwall from Michael Praetorius on Vimeo.