Back in 1994, while working for the World Wide Web Consortium (W3C), Håkon Wium Lie (pronounced more or less "how come") proposed the idea of Cascading Style Sheets (CSS). Got a CSS question? An Ajax question? Want to know why Håkon loves Free Software so much? Or something else, related or not? Go ahead and ask -- after checking some of the links above, so you don't duplicate questions he's answered in other interviews or in articles he's written. (One question per post, please.) We hope to post his answers Friday.