Zude's drag-n-drop Web authoring/remixing make it the Switzerland of the social Web
Although it is unquestionably one of the most revolutionary services to hit the Web in a long time -- one that, once out of beta, should prove to be equally usable and useful to Grandma as it is powerful to hackers, corporate developers, knowledge workers, and business analysts -- once you're done playing around with Fifth Generation System's Zude.com, you'll probably have as tough a time as I am putting your finger on how to categorize it.