Echelon is a wonderful way to see what the world is talking about.
Just enter your query, like "lady gaga", "#apple" or "@BarackObama" and watch as Echelon displays what the whole Twitter is saying about it - right now - one tweet at a time.
You don't need a Twitter account to use Echelon.
You can change Echelon's looks to your liking: zoom in/out with a pinch gesture on your multi-touch trackpad, enter full screen with a key press, and change colors and backgrounds whenever you like.
Echelon is great for wall projecting at parties and conferences, or just to look at Twitter in a whole new way.