"Despite the hype, the HTML5 specification isn't yet ready due to interoperability issues", a W3C official says. "It's a little too early to deploy HTML5 because we're running into interoperability issues", the same W3C official says. There are probably more reasons to think why NOT to use HTML5 or CSS3, but there are a lot of reasons why SHOULD use HTML5 or CSS3 today. One of them is a little company called Apple and their pretty mobile devices. Timan Rebel will give you a short introduction of HTMl5/CSS3 (not too long, it's not a tutorial) and will dive into several areas of HTML5 and CSS3 you can use today. He will talk about the video element, the Geolocation API, gradients and more. At the end of his talk Timan will show you some ways to make sure your site doesn't break in Internet Explorer 9-.