Here is a beautiful way of tracking a keyword within twitter. VisibleTweets displays all tweets containing your chosen search term (for an event you could search for a hashtag phrase) and moves from one tweet to another in a visibly superb manner.
This would be ideal for a conference / event, or within a classroom for tweets between schools or classes that contained a hashtag. The example video below uses the search phrase "2DIY"
The transition from tweet to tweet can be either letter by letter (shown above), rotation, or as a tag cloud;
Thanks to @tombarrett for mentioning this.
