By one measure, yesterday was the 20th anniversary of the World Wide Web. And the guy who was there at the beginning, Tim Berners-Lee, says we are still at the beginning! In his talk yesterday, he’s quoted as saying ‘The web is not all done; this is just the tip of the iceberg. New changes are going to rock the boat even more.’ I doubt there has ever been a technological innovation that got into the hands of so many people, so fast — and not just so that all these people can use the Web, but they can actually contribute to it and create with it. This is one of the main, though certainly not the only, reason computer science continues to be such an exciting field. There are so many opportunities to create and invent and solve problems in this still new world of the Web, not to mention the increasingly important and interesting field of studying what the Web is, how people use it, what effect it is having on the world, etc.