Google this morning kickstarted its annual I/O developer conference with a keynote full of surprises. Prior to that 9am presentation, however, the company was running a nice teaser over at the official Google I/O page. Thanks to some HTML5 magic, visitors could marvel at a dot-matrix display counting down the remaining hours, minutes and seconds. With each passing second the numbers would fall apart into dozes of dots bouncing off the screen edges. Missed that finale? No problem, Google has you covered with a Chrome Experiment that allows you to rewatch the last twenty seconds of the countdown.