This is probably the cutest Twitter app ever.
Just put your Twitter username (or any other search phrase) in IsParade.jp and the app will create an animated parade of the search results with some good marching band music (though you may want to reduce the volume a bit).
The animation is interactive so you can click the faces of anyone marching in the parade and it will pop-up the associated tweet in a bubble.
It’s a bit hard to explain the effect in words but the following video screencast may do some justice. Thank you Adam Schwartz and David Anderson for the tip.