Twitterfall was my first Twitter client, and so I have a fond feeling about it. It is a good "first" to have - it gives you a real sense of how Twitter works and lets you read all those tweets as they hit the ether. It's also an excellent way to monitor current Twitter trends.
What does Twitterfall do?
The aptly named Twitterfall Web site drops each tweet from the top of the screen; as the next tweet comes, it pushes the one before it down.
All this gives you the impression of a continuing drip, drip, drip of people sending out their tweets.
Twitterfall's main purpose is to help you keep track of trends; the latest ones are listed on the right side of the screen, and you can check as many you want to watch (or all of them, if you're a glutton for punishment).
You can also create your own search and/or include the Twitter accounts you are personally following. The tweets can be colour-coded so that you can easily find your personal tweets among the others; for example, you can make the trends gray, your personal search brown, and your followed accounts green.
A Settings box on the right side of the window lets you change the speed, type of animation, number of tweets and other features. A version is available for the iPhone.
What's cool about Twitterfall?
Watching each tweet drop from the heavens and make its way down to the bottom is almost hypnotic.
What needs to be fixed?
In the end, while Twitterfall is cool, it's really is more of a stunt than a practical way to follow your tweets. Even with the colour coding, mixing the tweets from different sources/searches isn't really a practical way to view them.