[Note 2013-08-24] This project is now defunct due to twitter’s OAuth requirements.
This is a wordpress plugin which connects to twitter and will serve you a live stream of tweets. You can set it up to follow certain people or track words related to your site. All you have to do is add a
Twitter Live Feed
This is not a normal plugin in the respect that it does require some background processes to be running. Please take a look at the README for more information.
You can download it here.