Node-FeedStreamer is an experiment in streaming relevant data using dynamic drivers. It comes with a Twitter driver, but many more can be easily added. (like Facebook or NYTimes)
The feed manager organizes your streams to funnel into one main processor. You can do whatever you like in your processor. There is an example of how to forward tweets to web client using socket.io. It follows the adapter design pattern so you can create as many feed providers as you like.