Junk Charts and its "sister blog", Numbers Rule the World, are long-running sites with trenchant critiques of the visual and textual display of information in media. Both are instructive for decoding the information glut, as well as getting your own messages across clearly. See for example, posts on display of census information and race; Trying Too Hard; and Over Plotting.
It's not a bug, it's a feature: Carolin Horn has designed Anymails, which represents your email messages and folders as micro-organisms. The morphology of the individual organisms and their behaviour within colonies imparts information about the state of your email. You can view QT movies of the application in action (1, 2), download her thesis, and download the Anymails code itself. See some of her other work here (predominantly in German). via Madame Martin, the "French Metafilter".