tweetstream is a Node.js app that's designed to show the results of a Twitter search on a big screen. It uses Twitter's streaming API to track a particular keyword, and then uses WebSockets to stream these to the front-end. The tweets are then queued up in the front end, and a new one is shown every 6 seconds.
Register an application with Twitter, and then set the following environment variables:
TWITTER_CONSUMER_KEYTWITTER_CONSUMER_SECRETTWITTER_ACCESS_TOKEN_KEYTWITTER_ACCESS_TOKEN_SECRET
You can then run the application like so:
$ node server.js
Finally, go to http://localhost:7080 to view the tweets.