INFO VISUALIZATION: Flight404 is an flash-heavy but still cool group of mini-projects created using Processing.
Processing itself is "a programming language and environment built for the electronic arts and visual design communities. It was created to teach fundamentals of computer programming within a visual context and to serve as an electronic sketchbook." Blah blah blah. Basically, it's a cute and simple language that allows anyone to make some pretty kick-ass visualizations. It's a project by Ben Fry (who, as I've said before, I love) and Casey Reas, both of MIT's Media Lab.
The projects on their site are more art then useful, but all the tools are there for applying processing to some interesting data-sets.