If you're using an old browser, look away now. Upon entering the highly advanced site of Hamburg agency deepblue's Christmas card, you're warned that "This is an HTML5 Experiment. Please use a modern broswer," in a sneering tone that makes you feel completely outdated. But once you get past that, the agency's experiment is cool, letting you create a personal tune by combining the ringtones of 12 devices. You can connect your phone to the page, and use it as a keyboard to compose your masterpiece.